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Evaluation of Injectable Hyaluronic Acid-Based Hydrogels for Endodontic Tissue Regeneration. MATERIALS 2021; 14:ma14237325. [PMID: 34885481 PMCID: PMC8658597 DOI: 10.3390/ma14237325] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Revised: 11/20/2021] [Accepted: 11/25/2021] [Indexed: 12/22/2022]
Abstract
Dental pulp tissue engineering (TE) endeavors to regenerate dentin/pulp complex by combining a suitable supporting matrix, stem cells, and biochemical stimuli. Such procedures foresee a matrix that can be easily introduced into the root canal system (RCS) and tightly adhere to dentin walls to assure the dentin surface’s proper colonization with progenitor cells capable of restoring the dentin/pulp complex. Herein was investigated an injectable self-setting hyaluronic acid-based (HA) hydrogel system, formed by aldehyde-modified (a-HA) with hydrazide-modified (ADH), enriched with platelet lysate (PL), for endodontic regeneration. The hydrogels’ working (wT) and setting (sT) times, the adhesion to the dentine walls, the hydrogel’s microstructure, and the delivery of human dental pulp cells (DPCs) were studied in vitro. Hydrogels incorporating PL showed a suitable wT and sT and a porous microstructure. The tensile tests showed that the breaking point occurs after 4.3106 ± 1.8677 mm deformation, while in the indentation test after 1.4056 ± 0.3065 mm deformation. Both breaking points occur in the hydrogel extension. The HA/PL hydrogels exhibited supportive properties and promoted cell migration toward dentin surfaces in vitro. Overall, these results support using PL-laden HA injectable hydrogels (HA/PL) as a biomaterial for DPCs encapsulation, thereby displaying great clinical potential towards endodontic regenerative therapies.
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Wu C, Chen W, Yu F, Yuan Y, Chen Y, Hurst DR, Li Y, Li L, Liu Z. Long Noncoding RNA HITTERS Protects Oral Squamous Cell Carcinoma Cells from Endoplasmic Reticulum Stress-Induced Apoptosis via Promoting MRE11-RAD50-NBS1 Complex Formation. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2020; 7:2002747. [PMID: 33240783 PMCID: PMC7675039 DOI: 10.1002/advs.202002747] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Indexed: 02/05/2023]
Abstract
Recent studies have proven that long noncoding RNAs (lncRNAs) exhibit regulatory functions of both DNA damage response (DDR) and endoplasmic reticulum (ER) stress. Herein, ER stress-induced lncRNA transcriptomic changes are reported in human oral squamous cell carcinoma (OSCC) cells and a novel lncRNA HITTERS ( H ERPUD1 intronic transcript of ER stress) is identified as the most significantly upregulated lncRNA. It is shown that HITTERS is a nucleus-located lncRNA including two transcript variants. HITTERS lacks an independent promoter but shares the same promoter with HERPUD1. HITTERS is transcriptionally regulated by Activating Transcription Factor (ATF) 6, ATF4, X-Box Binding Protein 1 (XBP1), and DNA methylation. In human OSCC tissues, HITTERS is significantly correlated with OSCC clinicopathological features and prognosis. Gain- and loss-of-function studies reveal that HITTERS promotes OSCC proliferation and invasion via influencing the expression of growth factor receptors and the downstream pathways. Once ER stress is triggered, HITTERS significantly attenuates ER stress-induced apoptosis both in vivo and in vitro. Mechanically, HITTERS functions as RNA scaffold to promote MRE11-RAD50-NBS1 complex formation in the repair of ER stress-induced DNA damage. To sum up, this study presents a novel lncRNA, namely HITTERS, which links ER stress and DDR together in OSCC.
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Affiliation(s)
- Chenzhou Wu
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases and Department of Head and Neck OncologyWest China Hospital of StomatologySichuan UniversityNumber 14, Unit 3, Renmin Nan RoadChengduSichuan610041China
| | - Wen Chen
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases and Department of Head and Neck OncologyWest China Hospital of StomatologySichuan UniversityNumber 14, Unit 3, Renmin Nan RoadChengduSichuan610041China
| | - Fanyuan Yu
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases and Department of EndodonticsWest China Hospital of StomatologySichuan UniversityNumber 14, Unit 3, Renmin Nan RoadChengduSichuan610041China
| | - Yihang Yuan
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases and Department of Head and Neck OncologyWest China Hospital of StomatologySichuan UniversityNumber 14, Unit 3, Renmin Nan RoadChengduSichuan610041China
| | - Yafei Chen
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases and Department of Head and Neck OncologyWest China Hospital of StomatologySichuan UniversityNumber 14, Unit 3, Renmin Nan RoadChengduSichuan610041China
| | - Douglas R. Hurst
- Department of PathologyUniversity of Alabama at BirminghamBirminghamAL35294USA
| | - Yi Li
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases and Department of Head and Neck OncologyWest China Hospital of StomatologySichuan UniversityNumber 14, Unit 3, Renmin Nan RoadChengduSichuan610041China
| | - Longjiang Li
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases and Department of Head and Neck OncologyWest China Hospital of StomatologySichuan UniversityNumber 14, Unit 3, Renmin Nan RoadChengduSichuan610041China
| | - Zhe Liu
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases and Department of Head and Neck OncologyWest China Hospital of StomatologySichuan UniversityNumber 14, Unit 3, Renmin Nan RoadChengduSichuan610041China
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Raddall G, Mello I, Leung BM. Biomaterials and Scaffold Design Strategies for Regenerative Endodontic Therapy. Front Bioeng Biotechnol 2019; 7:317. [PMID: 31803727 PMCID: PMC6874017 DOI: 10.3389/fbioe.2019.00317] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Accepted: 10/25/2019] [Indexed: 12/21/2022] Open
Abstract
Challenges with traditional endodontic treatment for immature permanent teeth exhibiting pulp necrosis have prompted interest in tissue engineering approaches to regenerate the pulp-dentin complex and allow root development to continue. These procedures are known as regenerative endodontic therapies. A fundamental component of the regenerative endodontic process is the presence of a scaffold for stem cells from the apical papilla to adhere to, multiply and differentiate. The aim of this review is to provide an overview of the biomaterial scaffolds that have been investigated to support stem cells from the apical papilla in regenerative endodontic therapy and to identify potential biomaterials for future research. An electronic search was conducted using Pubmed and Novanet databases for published studies on biomaterial scaffolds for regenerative endodontic therapies, as well as promising biomaterial candidates for future research. Using keywords "regenerative endodontics," "scaffold," "stem cells" and "apical papilla," 203 articles were identified after duplicate articles were removed. A second search using "dental pulp stem cells" instead of "apical papilla" yielded 244 articles. Inclusion criteria included the use of stem cells from the apical papilla or dental pulp stem cells in combination with a biomaterial scaffold; articles using other dental stem cells or no scaffolds were excluded. The investigated scaffolds were organized in host-derived, naturally-derived and synthetic material categories. It was found that the biomaterial scaffolds investigated to date possess both desirable characteristics and issues that limit their clinical applications. Future research investigating the scaffolds presented in this article may, ultimately, point to a protocol for a consistent, clinically-successful regenerative endodontic therapy.
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Affiliation(s)
- Gavin Raddall
- Faculty of Dentistry, Dalhousie University, Halifax, NS, Canada
| | - Isabel Mello
- Department of Dental Clinical Sciences, Faculty of Dentistry, Dalhousie University, Halifax, NS, Canada
| | - Brendan M. Leung
- Department of Applied Oral Sciences, Faculty of Dentistry, Dalhousie University, Halifax, NS, Canada
- School of Biomedical Engineering, Faculties of Medicine and Engineering, Dalhousie University, Halifax, NS, Canada
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Liu X, Cheng C, Peng X, Xiao H, Guo C, Wang X, Li L, Yu X. A promising material for bone repair: PMMA bone cement modified by dopamine-coated strontium-doped calcium polyphosphate particles. ROYAL SOCIETY OPEN SCIENCE 2019; 6:191028. [PMID: 31824710 PMCID: PMC6837193 DOI: 10.1098/rsos.191028] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/08/2019] [Accepted: 09/02/2019] [Indexed: 02/05/2023]
Abstract
Polymethyl methacrylate (PMMA) bone cement has been widely used in clinics as bone repair materials for its excellent mechanical properties and good injection properties. However, it also has defects such as poor biological performance, high temperature, and the monomer has certain toxicity. Our study tried to modify the PMMA bone cement by doping with various particle weight fractions (5, 10 and 15%) of SCPP particles and polydopamine-coated SCPP particles (D/SCPP) to overcome its clinical application disadvantages. Our study showed that all results of physical properties of samples are in accordance with ISO 5833. The 15% D/SCPP/PMMA composite bone cement had much better biocompatibility compared with pure PMMA bone cement and SCPP/PMMA composite bone cement due to the best cell growth-promoting mineralization deposition on the surface of 15% D/SCPP/PMMA composite bone cements and Sr2+ released from SCPP particles. Our research also revealed that the reaction temperature was found to be reduced with an increase in doped particles after incorporating the particles into composite bone cements. The novel PMMA bone cements modified by D/SCPP particles are promising materials for bone repair.
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Affiliation(s)
- Xing Liu
- College of Polymer Science and Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610065, People's Republic of China
| | - Can Cheng
- College of Polymer Science and Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610065, People's Republic of China
| | - Xu Peng
- College of Polymer Science and Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610065, People's Republic of China.,Laboratory Animal Center, Sichuan University, Chuanda Road, Chengdu 610065, People's Republic of China
| | - Hong Xiao
- Department of Pain Management, West China Hospital, Sichuan University, No. 37, GuoXue Xiang, Chengdu 610041, People's Republic of China
| | - Chengrui Guo
- College of Polymer Science and Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610065, People's Republic of China
| | - Xu Wang
- College of Polymer Science and Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610065, People's Republic of China
| | - Li Li
- Department of Oncology, The 452 Hospital of Chinese PLA, No. 317, Shunjiang Road, Chengdu, Sichuan Province 610021, People's Republic of China
| | - Xixun Yu
- College of Polymer Science and Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 610065, People's Republic of China
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Wang X, Wu C, Qi H, Tian M, Xie H, Wang Y, Gu Z, Peng X, Yu X. Introducing copper and collagen ( via poly(DOPA)) coating to activate inert ceramic scaffolds for excellent angiogenic and osteogenic capacity. RSC Adv 2018; 8:15575-15586. [PMID: 35539479 PMCID: PMC9080098 DOI: 10.1039/c8ra01960f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Accepted: 04/09/2018] [Indexed: 02/05/2023] Open
Abstract
Traditional calcium polyphosphate (CPP) scaffolds have attracted wide attention for repairing bone defects owing to their low cytotoxicity and controllable degradation. However, because of poor mechanical strength, significant brittleness and suboptimal osteoinductivity and osteoconductivity, their further clinical applications are restricted. To overcome these limitations, collagen (Col) coated Cu(ii) ion-doped calcium polyphosphate (CCPP) scaffolds were employed and dopamine (DOPA) was used as a linkage (CCPP/D/Col) to ensure their stable and tight structure. Controllable Cu(ii) ion continuously released from scaffolds together with collagen coating could simultaneously enhance the cytocompatibility, compressive strength and ductility, bone-related gene expression and new bone regeneration. In comparison with the initial CPP specimens, these multifunctional CCPP/D/Col composite scaffolds' crystal grains of CCPP were arranged regularly and well-ordered, and the size and rugosity were more suitable for cell spreading and attachment. Murine bone marrow stem cells (BMSCs) seeded on CCPP/D/Col scaffolds possessed better proliferation and migration, rapid attachment and enhanced expression of osteogenic-related genes, which indicated better bone regeneration. The potential mechanism of this process was further elucidated. Both copper doping and collagen coating could effectively stabilize hypoxia-inducible factor-1α (HIF-1α) that thus stimulates the expression of vascular endothelial growth factor (VEGF). In addition, they could also promote the osteogenic differentiation of cells through stimulating bone-related gene expression. The concept of introducing active ions and biological macromolecules to modify inert ceramics may offer a new strategy to construct a multifunctional composite scaffold for bone tissue regeneration.
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Affiliation(s)
- Xu Wang
- College of Polymer Science and Engineering, Sichuan University Chengdu 610065 China
| | - Chenzhou Wu
- Department of Head and Neck Oncology, West China Hospital of Sichuan University Chengdu Sichuan 610021 P. R. China
| | - Hao Qi
- College of Polymer Science and Engineering, Sichuan University Chengdu 610065 China
| | - Meng Tian
- Department of Neurosurgery, West China Hospital of Sichuan University Chengdu Sichuan 610041 P. R. China
| | - Huixu Xie
- Department of Head and Neck Oncology, West China Hospital of Sichuan University Chengdu Sichuan 610021 P. R. China
| | - Yaping Wang
- College of Polymer Science and Engineering, Sichuan University Chengdu 610065 China
| | - Zhipeng Gu
- Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instrument, School of Engineering, Sun Yat-sen University Guangzhou 510275 P. R. China
| | - Xu Peng
- Experimental Animal Center of Sichuan University Chengdu 610065 P. R. China
| | - Xixiun Yu
- College of Polymer Science and Engineering, Sichuan University Chengdu 610065 China
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Sheikh Z, Hamdan N, Ikeda Y, Grynpas M, Ganss B, Glogauer M. Natural graft tissues and synthetic biomaterials for periodontal and alveolar bone reconstructive applications: a review. Biomater Res 2017; 21:9. [PMID: 28593053 PMCID: PMC5460509 DOI: 10.1186/s40824-017-0095-5] [Citation(s) in RCA: 181] [Impact Index Per Article: 25.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Accepted: 05/16/2017] [Indexed: 12/11/2022] Open
Abstract
Periodontal disease is categorized by the destruction of periodontal tissues. Over the years, there have been several clinical techniques and material options that been investigated for periodontal defect repair/regeneration. The development of improved biomaterials for periodontal tissue engineering has significantly improved the available treatment options and their clinical results. Bone replacement graft materials, barrier membranes, various growth factors and combination of these have been used. The available bone tissue replacement materials commonly used include autografts, allografts, xenografts and alloplasts. These graft materials mostly function as osteogenic, osteoinductive and/or osteoconductive scaffolds. Polymers (natural and synthetic) are more widely used as a barrier material in guided tissue regeneration (GTR) and guided bone regeneration (GBR) applications. They work on the principle of epithelial cell exclusion to allow periodontal ligament and alveolar bone cells to repopulate the defect before the normally faster epithelial cells. However, in an attempt to overcome complications related to the epithelial down-growth and/or collapse of the non-rigid barrier membrane and to maintain space, clinicians commonly use a combination of membranes with hard tissue grafts. This article aims to review various available natural tissues and biomaterial based bone replacement graft and membrane options used in periodontal regeneration applications.
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Affiliation(s)
- Zeeshan Sheikh
- Matrix Dynamics Group, Faculty of Dentistry, University of Toronto, Room 221, 150 College Street, Toronto, ON M5S 3E2 Canada
- Lunenfeld-Tanenbaum Research Institute, Mt. Sinai Hospital, 25 Orde St, Toronto, ON M5T 3H7 Canada
| | - Nader Hamdan
- Department of Dental Clinical Sciences, Faculty of Dentistry, Dalhousie University, 5981 University Avenue, PO Box 15000, Halifax, Nova Scotia B3H 4R2 Canada
| | - Yuichi Ikeda
- Matrix Dynamics Group, Faculty of Dentistry, University of Toronto, Room 221, 150 College Street, Toronto, ON M5S 3E2 Canada
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima Bunkyo-ku, Tokyo, 113-5810 Japan
| | - Marc Grynpas
- Lunenfeld-Tanenbaum Research Institute, Mt. Sinai Hospital, 25 Orde St, Toronto, ON M5T 3H7 Canada
| | - Bernhard Ganss
- Matrix Dynamics Group, Faculty of Dentistry, University of Toronto, Room 221, 150 College Street, Toronto, ON M5S 3E2 Canada
| | - Michael Glogauer
- Matrix Dynamics Group, Faculty of Dentistry, University of Toronto, Room 221, 150 College Street, Toronto, ON M5S 3E2 Canada
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Comeau PA, Filiaggi MJ. Structural analysis of xSrO-(50 - x)CaO-50P2O5 glasses with x=0, 5, or 10 mol% for potential use in a local delivery system for osteomyelitis treatment. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 58:639-47. [PMID: 26478355 DOI: 10.1016/j.msec.2015.08.069] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Revised: 08/20/2015] [Accepted: 08/28/2015] [Indexed: 11/26/2022]
Abstract
The introduction of ions into a local delivery matrix is one method of managing degradation and subsequent release of the incorporated therapeutic agents. Of interest in this study was whether we could modify the structural nature of calcium polyphosphate (CPP) glass and the subsequent therapeutic potential of this local delivery matrix with inclusion of strontium (Sr). We found that adding 10 mol% Sr significantly increased the density and chain length of the glass. There was no significant impact of Sr doping on the subsequent loading of vancomycin into the matrix, or the matrix porosity. The noted differences in structural stability, ion release, and vancomycin release between the un-doped CPP matrices and 10 mol% Sr-doped CPP matrices in vitro are likely a result of a decrease in glass disorder upon Sr addition to the glass and preferential retention of Sr over Ca during matrix degradation. This study has provided further evidence that Sr incorporation may serve to both manipulate antibiotic release from the amorphous CPP matrix and provide a potential source of therapeutic ions for enhanced bone regeneration.
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Affiliation(s)
- P A Comeau
- School of Biomedical Engineering, Dalhousie University, Halifax, Nova Scotia B3H 3J5, Canada
| | - M J Filiaggi
- School of Biomedical Engineering, Dalhousie University, Halifax, Nova Scotia B3H 3J5, Canada; Department of Applied Oral Sciences, Dalhousie University, 5981 University Avenue, Halifax, Nova Scotia B3H 3J5, Canada.
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8
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QIN H, YANG Z, LI L, YANG X, LIU J, CHEN X, YU X. A promising scaffold with excellent cytocompatibility and pro-angiogenesis action for dental tissue engineering: Strontium-doped calcium polyphosphate. Dent Mater J 2016; 35:241-9. [PMID: 27041014 DOI: 10.4012/dmj.2015-272] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Huanhuan QIN
- College of Polymer Science and Engineering, Sichuan University
| | - Zhouyuan YANG
- Department of Orthopaedics, West China Hospital ,Sichuan University
| | - Li LI
- Department of Oncology, the 452 Hospital of Chinese PLA
| | - Xu YANG
- College of Polymer Science and Engineering, Sichuan University
| | - Jingwang LIU
- College of Polymer Science and Engineering, Sichuan University
| | - Xi CHEN
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, and Collaborative Innovation Center for Biotherapy
| | - Xixun YU
- College of Polymer Science and Engineering, Sichuan University
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9
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Siqueira L, Passador F, Costa M, Lobo A, Sousa E. Influence of the addition of β-TCP on the morphology, thermal properties and cell viability of poly (lactic acid) fibers obtained by electrospinning. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 52:135-43. [DOI: 10.1016/j.msec.2015.03.055] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2014] [Revised: 02/20/2015] [Accepted: 03/24/2015] [Indexed: 12/16/2022]
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10
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Viale-Bouroncle S, Buergers R, Morsczeck C, Gosau M. β-Tricalcium phosphate induces apoptosis on dental follicle cells. Calcif Tissue Int 2013; 92:412-7. [PMID: 23334352 DOI: 10.1007/s00223-012-9694-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/09/2012] [Accepted: 12/02/2012] [Indexed: 01/14/2023]
Abstract
Dental stem cells represent a good treatment option in regenerative dentistry. Regeneration of large bone defects can be achieved by a cell-based therapy consisting of osteogenic progenitor cells, such as dental follicle precursor cells (DFCs), in combination with bone substitute material used as a scaffold. A previous trial had shown that β-tricalcium phosphate (TCP) improves the osteogenic differentiation of DFCs. In the present trial, we investigated the attachment, survival, and proliferation of DFCs on TCP in more detail. A high initial cell number was required for the adhesion, attachment, and sufficient proliferation of DFCs on a TCP scaffold. The TCP scaffold released fine soluble particles enriched in TCP eluates that induced cell death and showed typical characteristics of programmed cell death (apoptosis) in DFCs. During cultivation on the TCP scaffold, DFCs showed a highly upregulated expression of antiapoptotic genes but a downregulated expression of proapoptotic markers. In conclusion, TCP supports osteogenic differentiation in DFCs but also induces programmed cell death. Our data suggest that surviving DFCs avoid programmed cell death by inducing antiapoptotic genes.
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Affiliation(s)
- S Viale-Bouroncle
- Department of Oral and Maxillofacial Surgery, University Hospital Regensburg, Franz-Josef Strauss Allee 11, 93053, Regensburg, Germany
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Khanna-Jain R, Mannerström B, Vuorinen A, Sándor GK, Suuronen R, Miettinen S. Osteogenic differentiation of human dental pulp stem cells on β-tricalcium phosphate/poly (l-lactic acid/caprolactone) three-dimensional scaffolds. J Tissue Eng 2012; 3:2041731412467998. [PMID: 23316276 PMCID: PMC3540691 DOI: 10.1177/2041731412467998] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Functional tissue engineering for bone augmentation requires the appropriate combination of biomaterials, mesenchymal stem cells, and specific differentiation factors. Therefore, we investigated the morphology, attachment, viability, and proliferation of human dental pulp stem cells cultured in xeno-free conditions in human serum medium seeded on β-tricalcium phosphate/poly(l-lactic acid/caprolactone) three-dimensional biomaterial scaffold. Additionally, osteogenic inducers dexamethasone and vitamin D3 were compared to achieve osteogenic differentiation. Dental pulp stem cells cultured in human serum medium maintained their morphology; furthermore, cells attached, remained viable, and increased in cell number within the scaffold. Alkaline phosphatase staining showed the osteogenic potential of dental pulp stem cells under the influence of osteogenic medium containing vitamin D3 or dexamethasone within the scaffolds. Maintenance of dental pulp stem cells for 14 days in osteogenic medium containing vitamin D3 resulted in significant increase in osteogenic markers as shown at mRNA level in comparison to osteogenic medium containing dexamethasone. The results of this study show that osteogenic medium containing vitamin D3 osteo-induced dental pulp stem cells cultured in human serum medium within β-tricalcium phosphate/poly(l-lactic acid/caprolactone) three-dimensional biomaterial, which could be directly translated clinically.
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Affiliation(s)
- Rashi Khanna-Jain
- Adult Stem Cells Group, Institute of Biomedical Technology, University of Tampere, Tampere, Finland ; BioMediTech, Tampere, Finland ; Science Centre, Tampere University Hospital, Tampere, Finland
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Gu Z, Zhang X, Li L, Wang Q, Yu X, Feng T. Acceleration of segmental bone regeneration in a rabbit model by strontium-doped calcium polyphosphate scaffold through stimulating VEGF and bFGF secretion from osteoblasts. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2012; 33:274-81. [PMID: 25428072 DOI: 10.1016/j.msec.2012.08.040] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2012] [Revised: 07/22/2012] [Accepted: 08/29/2012] [Indexed: 12/15/2022]
Abstract
The development of suitable bioactive three-dimensional scaffold for the promotion of bone regeneration is critical in bone tissue engineering. The purpose of this study was to investigate in vivo osteogenesis of the porous strontium-doped calcium polyphosphate (SCPP) scaffolds for bone repair, as well as the relationship between osteogenic properties of SCPP scaffolds and the secretion of bFGF and VEGF from osteoblasts stimulated by SCPP. Besides, the advantages of scaffolds seeded with mesenchymal stem cells (MSCs) for bone repair were also studied. Firstly, the bone repair evaluation of scaffolds was performed on a rabbit segmental bony defects model over a period of 16 weeks by histology combined with X-ray microradiography. And then, in order to avoid the influence from the other factors such as hypoxia which emerge in vivo study and affect the secretion of VEGF and bFGF from host cells, human osteoblast-like cells (MG63) were seeded to SCPP, CPP and HA scaffolds in vitro to determine the ability of these scaffolds to stimulate the secretion of angiogenic growth factors (VEGF and bFGF) from MG63 and further explore the reason for the better osteogenic properties of SCPP scaffolds. The histological and X-ray microradiographic results showed that the SCPP scaffolds presented better osteogenic potential than CPP and HA scaffolds, when combined with MSCs, the SCPP scaffolds could further accelerate the bone repair. And the amounts of VEGF measured by ELISA assay in SCPP, CPP and HA groups after cultured for 7 days were about 364.989 pg/mL, 244.035 pg/mL and 232.785 pg/mL, respectively. Accordingly, the amounts of bFGF were about 27.085 pg/mL, 15.727 pg/mL and 8.326 pg/mL. The results revealed that the SCPP scaffolds significantly enhanced the bFGF and VEGF secretion compared with other scaffolds. The results presented in vivo and in vitro study demonstrated that the SCPP could accelerate bone formation through stimulating the secretion of VEGF and bFGF from osteoblasts, making it attractive for bone regeneration.
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Affiliation(s)
- Zhipeng Gu
- College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, PR China
| | - Xu Zhang
- College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Li Li
- Department of Oncology, the 452 Hospital of Chinese PLA, Chengdu, Sichuan Province 610021, P.R. China
| | - Qiguang Wang
- College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Xixun Yu
- College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, P. R. China; Suzhou Institute of Sichuan University, Suzhou 215123, P. R. China.
| | - Ting Feng
- The Joint Research Center of West China Second University Hospital of Sichuan University and University of Hong Kong, Chengdu 610041, P. R. China
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Catón J, Bostanci N, Remboutsika E, De Bari C, Mitsiadis TA. Future dentistry: cell therapy meets tooth and periodontal repair and regeneration. J Cell Mol Med 2011; 15:1054-65. [PMID: 21199329 PMCID: PMC3822618 DOI: 10.1111/j.1582-4934.2010.01251.x] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Cell-based tissue repair of the tooth and – tooth-supporting – periodontal ligament (PDL) is a new attractive approach that complements traditional restorative or surgical techniques for replacement of injured or pathologically damaged tissues. In such therapeutic approaches, stem cells and/or progenitor cells are manipulated in vitro and administered to patients as living and dynamic biological agents. In this review, we discuss the clonogenic potential of human dental and periodontal tissues such as the dental pulp and the PDL and their potential for tooth and periodontal repair and/or regeneration. We propose novel therapeutic approaches using stem cells or progenitor cells, which are targeted to regenerate the lost dental or periodontal tissue.
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Affiliation(s)
- Javier Catón
- Clinical and Diagnostic Sciences, Dental Institute, King's College London, London, UK
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14
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Shao MY, Fu ZS, Cheng R, Yang H, Cheng L, Wang FM, Hu T. The presence of open dentinal tubules affects the biological properties of dental pulp cells ex vivo. Mol Cells 2011; 31:65-71. [PMID: 21120627 PMCID: PMC3906866 DOI: 10.1007/s10059-011-0010-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2010] [Revised: 10/20/2010] [Accepted: 10/21/2010] [Indexed: 01/09/2023] Open
Abstract
To investigate the effects of open dentinal tubules on the morphological and functional characteristics of dental pulp cells. Morphological changes in human dental pulp cells that were seeded onto dentin discs with open dentinal tubules were investigated on days 1, 2, 4, and 10 of culture using scanning electron microscopy and fluorescence microscopy. Samples collected on days 1, 3, 6, 8, and 10 of culture were evaluated for cell proliferation rate and alkaline phosphatase activity. Cultured human dental pulp cells developed a columnar or polygonal morphology and monopolar cytoplasmic processes that extended into the dentinal tubules. The cells formed a multilayer and secreted an extracellular matrix onto the cell surface. Scanning electron microscopy and fluorescence microscopy revealed polarized organization of odontoblasts. Cells seeded onto dentin discs proliferated minimally but showed high levels of ALP activity. Dental pulp cells seeded onto treated dentin discs develop an odontoblastlike phenotype, which may be a potential alternative for use in experimental research on dentinogenesis.
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Affiliation(s)
| | - Zhong-Sen Fu
- Affiliated Stomatological Hospital of Chongqing Medical University, Chongqing, China
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15
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Vallés-Lluch A, Novella-Maestre E, Sancho-Tello M, Pradas MM, Ferrer GG, Batalla CC. Mimicking natural dentin using bioactive nanohybrid scaffolds for dentinal tissue engineering. Tissue Eng Part A 2010; 16:2783-93. [PMID: 20388038 DOI: 10.1089/ten.tea.2010.0090] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Synthetic materials mimicking the internal porous structure of natural dentin were prepared as nanohybrid matrix scaffolds made of poly(ethyl methacrylate-co-hydroxyethyl acrylate), pure and with a sol-gel-derived interpenetrated silica nanophase, with aligned tubular pores in the micrometer range typical of dentinal tissue. Some of them were internally coated with a layer of hydroxyapatite by immersion in simulated body fluid. Their physicochemical and mechanical properties were investigated. The different types of scaffolds were implanted subcutaneously into immunocompromised nude mice for 4, 6, and 8 weeks and their biological response were analyzed. Optical microscopy was employed to study the scaffold structure and neovascularization. Cells origin, inflammation, and macrophagic responses were evaluated by optical microscopy, immunohistochemistry, and transmission electron microscopy. The scaffold ultrastructural pattern imitates dentinal histological structure. The materials allowed cell colonization and neoangiogenesis. These biomaterials were colonized by murine cells fenotypically different to those of dermal connective tissue, showing structural differentiations. Colonization and viability were improved by the use of mineralized interphases, which showed a cellular distribution resembling a neodentinal pattern. Invasion of the scaffold tubules by single odontoblast-like processes was ascertained both in the noncoated and coated scaffolds. Such materials thus seem promising in tissue engineering strategies for dentin regeneration.
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Affiliation(s)
- Ana Vallés-Lluch
- Center for Biomaterials and Tissue Engineering, Universidad Politécnica de Valencia, Valencia 46022, Spain.
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16
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17
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Wang FM, Hu T, Cheng R, Tan H, Zhou XD. Substance P influenced gelatinolytic activity via reactive oxygen species in human pulp cells. Int Endod J 2008; 41:856-62. [DOI: 10.1111/j.1365-2591.2008.01437.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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18
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Chen YW, Shi GQ, Ding YL, Yu XX, Zhang XH, Zhao CS, Wan CX. In vitro study on the influence of strontium-doped calcium polyphosphate on the angiogenesis-related behaviors of HUVECs. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2008; 19:2655-2662. [PMID: 18197373 DOI: 10.1007/s10856-007-3350-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2006] [Accepted: 12/05/2007] [Indexed: 05/25/2023]
Abstract
Angiogenesis is of great importance in bone tissue engineering, and has gained large attention in the past decade. Strontium-doped calcium polyphosphate (SCPP) is a novel biodegradable material which has been proved to be able to promote in vivo angiogenesis during bone regeneration. An in vitro culture system was developed in the present work to examine its influence on angiogenesis-related behaviors of human umbilical vein endothelial cells (HUVECs), including cell adhesion, spreading, proliferation and migration. The effects of microtopography, chemical property and the ingredients in the degradation fluid (DF) on cell behaviors were discussed. The results showed that cells attached and spread better on SCPP scaffold than on calcium polyphosphate (CPP), which might partially result from the less rough surface of SCPP scaffold and the less hydrogel formed on the surface. In addition, cell proliferation was significantly improved when treated with SCPP DF compared with the treatment with CPP DF. Statistical analysis indicated that Sr(2+) in SCPP DF might be the main reason for the improved cell proliferation. Moreover, cell migration, another important step during angiogenesis, was evidently stimulated by SCPP DF. The improved in vivo angiogenesis by SCPP might be assigned to its better surface properties and strontium in the DF. This work also provides a new method for in vitro evaluation of biodegradable materials' potential effects on angiogenesis.
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Affiliation(s)
- Y W Chen
- Sichuan University, Chengdu, China
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19
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Kanungo BP, Silva E, Vliet KV, Gibson LJ. Characterization of mineralized collagen-glycosaminoglycan scaffolds for bone regeneration. Acta Biomater 2008; 4:490-503. [PMID: 18294943 DOI: 10.1016/j.actbio.2008.01.003] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2007] [Revised: 11/28/2007] [Accepted: 01/04/2008] [Indexed: 11/25/2022]
Abstract
Mineralized collagen-glycosaminoglycan scaffolds designed for bone regeneration have been synthesized via triple co-precipitation in the absence of a titrant phase. Here, we characterize the microstructural and mechanical properties of these newly developed scaffolds with 50 and 75 wt.% mineral content. The 50 wt.% scaffold had an equiaxed pore structure with isotropic mechanical properties and a Ca-P-rich mineral phase comprised of brushite; the 75 wt.% scaffold had a bilayer structure with a pore size varying in the through-thickness direction and a mineral phase comprised of 67% brushite and 33 wt.% monetite. The compressive stress-strain response of the scaffolds was characteristic of low-density open-cell foams with distinct linear elastic, collapse plateau and densification regimes. The elastic modulus and strength of individual struts within the scaffolds were measured using an atomic force microscopy cantilevered beam-bending technique and compared with the composite response under indentation and unconfined compression. Cellular solids models, using the measured strut properties, overestimated the overall mechanical properties for the scaffolds; the discrepancy arises from defects such as disconnected pore walls within the scaffold. As the scaffold stiffness and strength decreased with increasing overall mineral content and were less than that of natural, mineralized collagen scaffolds, these microstructural/mechanical relations will be used to further improve scaffold design for bone regeneration applications.
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Ding YL, Chen YW, Qin YJ, Shi GQ, Yu XX, Wan CX. Effect of polymerization degree of calcium polyphosphate on its microstructure and in vitro degradation performance. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2008; 19:1291-5. [PMID: 17713843 DOI: 10.1007/s10856-007-3235-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2006] [Accepted: 07/05/2007] [Indexed: 05/16/2023]
Abstract
Preparation, characterization and in vitro study of a series of calcium polyphosphate (CPP) with different polymerization degree were reported. A series of CPP with different polymerization degree were prepared by controlling calcining time. Average polymerization degree was analyzed by liquid state 31P nuclear magnetic resonance (NMR). The microstructure was observed by scanning electric microscope (SEM). X-ray diffraction (XRD) analysis was used to demonstrate that polymerization degree would not affect the crystal system and space group of CPP. The results showed that polymerization degree increased with the increase of calcining time. Degradation studies were performed during 32 days in physiological saline solution (aqueous solution, 0.9 wt.%NaCl) to assess the effect of polymerization degree on the degradation velocity of the samples. It was also shown that the degradation velocity of CPP (polymerization degree=13) doubles than another two samples (polymerization degree=9,19). The results in the present study may be able to provide some fundamental data for controlling CPP degradation.
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Affiliation(s)
- Yu Long Ding
- Department of Polymer Science and Engineering, Sichun University, Chengdu 610065, China
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21
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Abstract
AbstractFor many years, operative dentistry has been using regenerative approaches to treat dental disease. The use of calcium hydroxide to stimulate reparative or reactionary dentin is clearly an example of such a therapeutic strategy. The advent of tissue engineering is allowing dentistry to move forward in the use of regeneration as an underlying principle for the treatment of dental disease. Tissue engineering is a multi-disciplinary science that brings together biology, engineering and clinical sciences with developing new tissues and organs. It is based on fundamental principles that involve the identification of appropriate cells, the development of conducive scaffolds and an understanding of the morphogenic signals required to induce cells to regenerate the tissues that were lost. This review is focused on the presentation and discussion of existing literature that covers the engineering of enamel, dentin and pulp, as well on the engineering of entire teeth. There are clearly major roadblocks to overcome before such strategies move to the clinic and are used regularly to treat patients. However, existing evidence strongly suggests that the engineering of new dental structures to replace tissues lost during the process of caries or trauma will have a place in the future of operative dentistry.
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Affiliation(s)
- Jacques E Nör
- Dept of Cariology, Restorative Sciences, Endodontics, University of Michigan, Ann Arbor, MI 48109, USA.
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