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Zhou H, Yang L, Gbureck U, Bhaduri SB, Sikder P. Monetite, an important calcium phosphate compound-Its synthesis, properties and applications in orthopedics. Acta Biomater 2021; 127:41-55. [PMID: 33812072 DOI: 10.1016/j.actbio.2021.03.050] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 03/22/2021] [Accepted: 03/23/2021] [Indexed: 12/15/2022]
Abstract
This review recognizes a unique calcium phosphate (CaP) phase known as monetite or dicalcium phosphate anhydrous (DCPA, CaHPO4), and presents an overview of its properties, processing, and applications in orthopedics. The motivation for the present effort is to highlight the state-of-the-art research and development of monetite and propel the research community to explore more of its potentials in orthopedics. After a brief introduction of monetite, we provide a summary of its various synthesis routes like dehydration, solvent-based, energy-assisted processes and also discuss the formation of different crystal structures with respect to the synthesis conditions. Subsequently, we discuss the material's noteworthy physico-chemical properties including the crystal structure, vibrational spectra, solubility, thermal decomposition, and conversion to other phases. Of note, we focus on the biological (in vitro and in vivo) properties of monetite, given its ever-increasing popularity as a biomaterial for medical implants. Appropriately, we discuss various orthopedic applications of monetite as bone cement, implant coatings, granules for defect fillers, and scaffolds. Many in vitro and in vivo studies confirmed the favorable osteointegration and osteoconduction properties of monetite products, along with a better balance between implant resorption and new bone formation as compared to other CaP phases. The review ends with translational aspects of monetite and presents thoughts about its possible future research directions. Further research may explore but not limited to improvements in mechanical strength of monetite-based scaffolds, using monetite particles as a therapeutic agent delivery, and tissue engineering strategies where monetite serves as the biomaterial. STATEMENT OF SIGNIFICANCE: This is the first review that focusses on the favorable potential of monetite for hard tissue repair and regeneration. The article accurately covers the "Synthesis-Structure-Property-Applications" correlations elaborating on monetite's diverse material properties. Special focus is put on the in vitro and in vivo properties of the material highlighting monetite as an orthopedic material-of-choice. The synthesis techniques are discussed which provide important information about the different fabrication routes for monetite. Most importantly, the review provides comprehensive knowledge about the diverse biomedical applications of monetite as granules, defect--specific scaffolds, bone cements and implant coatings. This review will help to highlight monetite's potential as an effective regenerative medicine and catalyze the continuing translation of this bioceramic from the laboratory to clinics.
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Affiliation(s)
- H Zhou
- Center for Health Science and Engineering, School of Materials Science and Engineering, Hebei University of Technology, Tianjin, China; International Research Center for Translational Orthopaedics (IRCTO), Jiangsu, China
| | - L Yang
- Center for Health Science and Engineering, School of Materials Science and Engineering, Hebei University of Technology, Tianjin, China; International Research Center for Translational Orthopaedics (IRCTO), Jiangsu, China
| | - U Gbureck
- Department for Functional Materials in Medicine and Dentistry, University Hospital of Würzburg, Würzburg, Germany
| | - S B Bhaduri
- Department of Mechanical, Industrial & Manufacturing Engineering, The University of Toledo, Toledo, OH, USA; ENG-EEC Division, The National Science Foundation (NSF), Alexandria, VA, USA
| | - P Sikder
- Department of Mechanical Engineering, Cleveland State University, Cleveland, OH, USA.
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Anwar I, Ashfaq UA, Shokat Z. Therapeutic Potential of Umbilical Cord Stem Cells for Liver Regeneration. Curr Stem Cell Res Ther 2020; 15:219-232. [PMID: 32077830 DOI: 10.2174/1568026620666200220122536] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 07/16/2019] [Accepted: 08/08/2019] [Indexed: 01/18/2023]
Abstract
The liver is a vital organ for life and the only internal organ that is capable of natural regeneration. Although the liver has high regeneration capacity, excessive hepatocyte death can lead to liver failure. Various factors can lead to liver damage including drug abuse, some natural products, alcohol, hepatitis, and autoimmunity. Some models for studying liver injury are APAP-based model, Fas ligand (FasL), D-galactosamine/endotoxin (Gal/ET), Concanavalin A, and carbon tetrachloride-based models. The regeneration of the liver can be carried out using umbilical cord blood stem cells which have various advantages over other stem cell types used in liver transplantation. UCB-derived stem cells lack tumorigenicity, have karyotype stability and high immunomodulatory, low risk of graft versus host disease (GVHD), low risk of transmitting somatic mutations or viral infections, and low immunogenicity. They are readily available and their collection is safe and painless. This review focuses on recent development and modern trends in the use of umbilical cord stem cells for the regeneration of liver fibrosis.
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Affiliation(s)
- Ifrah Anwar
- Department of Bioinformatics and Biotechnology, Government College University, Faisalabad, Pakistan
| | - Usman A Ashfaq
- Department of Bioinformatics and Biotechnology, Government College University, Faisalabad, Pakistan
| | - Zeeshan Shokat
- Department of Bioinformatics and Biotechnology, Government College University, Faisalabad, Pakistan
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Liu J, Dai Q, Weir MD, Schneider A, Zhang C, Hack GD, Oates TW, Zhang K, Li A, Xu HHK. Biocompatible Nanocomposite Enhanced Osteogenic and Cementogenic Differentiation of Periodontal Ligament Stem Cells In Vitro for Periodontal Regeneration. MATERIALS 2020; 13:ma13214951. [PMID: 33158111 PMCID: PMC7663634 DOI: 10.3390/ma13214951] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 10/28/2020] [Accepted: 10/31/2020] [Indexed: 12/20/2022]
Abstract
Decays in the roots of teeth is prevalent in seniors as people live longer and retain more of their teeth to an old age, especially in patients with periodontal disease and gingival recession. The objectives of this study were to develop a biocompatible nanocomposite with nano-sized calcium fluoride particles (Nano-CaF2), and to investigate for the first time the effects on osteogenic and cementogenic induction of periodontal ligament stem cells (hPDLSCs) from human donors.Nano-CaF2 particles with a mean particle size of 53 nm were produced via a spray-drying machine.Nano-CaF2 was mingled into the composite at 0%, 10%, 15% and 20% by mass. Flexural strength (160 ± 10) MPa, elastic modulus (11.0 ± 0.5) GPa, and hardness (0.58 ± 0.03) GPa for Nano-CaF2 composite exceeded those of a commercial dental composite (p < 0.05). Calcium (Ca) and fluoride (F) ions were released steadily from the composite. Osteogenic genes were elevated for hPDLSCs growing on 20% Nano-CaF2. Alkaline phosphatase (ALP) peaked at 14 days. Collagen type 1 (COL1), runt-related transcription factor 2 (RUNX2) and osteopontin (OPN) peaked at 21 days. Cementogenic genes were also enhanced on 20% Nano-CaF2 composite, promoting cementum adherence protein (CAP), cementum protein 1 (CEMP1) and bone sialoprotein (BSP) expressions (p < 0.05). At 7, 14 and 21 days, the ALP activity of hPDLSCs on 20% Nano-CaF2 composite was 57-fold, 78-fold, and 55-fold greater than those of control, respectively (p < 0.05). Bone mineral secretion by hPDLSCs on 20% Nano-CaF2 composite was 2-fold that of control (p < 0.05). In conclusion, the novel Nano-CaF2 composite was biocompatible and supported hPDLSCs. Nano-CaF2 composite is promising to fill tooth root cavities and release Ca and F ions to enhance osteogenic and cementogenic induction of hPDLSCs and promote periodontium regeneration.
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Affiliation(s)
- Jin Liu
- Key Laboratory of Shannxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi’an Jiaotong University, Xi’an 710004, China; (J.L.); (Q.D.)
- Clinical Research Center of Shannxi Province for Dental and Maxillofacial Diseases, College of Stomatology, Xi’an Jiaotong University, Xi’an 710004, China
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland Dental School, Baltimore, MD 21201, USA; (M.D.W.); (C.Z.); (G.D.H.); (T.W.O.)
| | - Quan Dai
- Key Laboratory of Shannxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi’an Jiaotong University, Xi’an 710004, China; (J.L.); (Q.D.)
- Clinical Research Center of Shannxi Province for Dental and Maxillofacial Diseases, College of Stomatology, Xi’an Jiaotong University, Xi’an 710004, China
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland Dental School, Baltimore, MD 21201, USA; (M.D.W.); (C.Z.); (G.D.H.); (T.W.O.)
| | - Michael D. Weir
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland Dental School, Baltimore, MD 21201, USA; (M.D.W.); (C.Z.); (G.D.H.); (T.W.O.)
| | - Abraham Schneider
- Department of Oncology and Diagnostic Sciences, University of Maryland School of Dentistry, Baltimore, MD 21201, USA;
- Member, Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Charles Zhang
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland Dental School, Baltimore, MD 21201, USA; (M.D.W.); (C.Z.); (G.D.H.); (T.W.O.)
| | - Gary D. Hack
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland Dental School, Baltimore, MD 21201, USA; (M.D.W.); (C.Z.); (G.D.H.); (T.W.O.)
| | - Thomas W. Oates
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland Dental School, Baltimore, MD 21201, USA; (M.D.W.); (C.Z.); (G.D.H.); (T.W.O.)
| | - Ke Zhang
- Department of Orthodontics, School of Stomatology, Capital Medical University, Beijing 100069, China
- Correspondence: (K.Z.); (A.L.); (H.H.K.X.); Tel.: +86-010-5709-9222 (K.Z.); +86-029-8721-6572 (A.L.); +86-44-3562-1295 (H.H.K.X.)
| | - Ang Li
- Key Laboratory of Shannxi Province for Craniofacial Precision Medicine Research, College of Stomatology, Xi’an Jiaotong University, Xi’an 710004, China; (J.L.); (Q.D.)
- Clinical Research Center of Shannxi Province for Dental and Maxillofacial Diseases, College of Stomatology, Xi’an Jiaotong University, Xi’an 710004, China
- Correspondence: (K.Z.); (A.L.); (H.H.K.X.); Tel.: +86-010-5709-9222 (K.Z.); +86-029-8721-6572 (A.L.); +86-44-3562-1295 (H.H.K.X.)
| | - Hockin H. K. Xu
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland Dental School, Baltimore, MD 21201, USA; (M.D.W.); (C.Z.); (G.D.H.); (T.W.O.)
- Member, Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA
- Center for Stem Cell Biology & Regenerative Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, USA
- Correspondence: (K.Z.); (A.L.); (H.H.K.X.); Tel.: +86-010-5709-9222 (K.Z.); +86-029-8721-6572 (A.L.); +86-44-3562-1295 (H.H.K.X.)
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Paknahad A, Kucko NW, Leeuwenburgh SC, Sluys LJ. Experimental and numerical analysis on bending and tensile failure behavior of calcium phosphate cements. J Mech Behav Biomed Mater 2020; 103:103565. [DOI: 10.1016/j.jmbbm.2019.103565] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 11/26/2019] [Accepted: 11/27/2019] [Indexed: 10/25/2022]
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Self-Setting Calcium Orthophosphate (CaPO4) Formulations. SPRINGER SERIES IN BIOMATERIALS SCIENCE AND ENGINEERING 2018. [DOI: 10.1007/978-981-10-5975-9_2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Elastic properties and strain-to-crack-initiation of calcium phosphate bone cements: Revelations of a high-resolution measurement technique. J Mech Behav Biomed Mater 2017; 74:428-437. [DOI: 10.1016/j.jmbbm.2017.06.023] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Revised: 06/16/2017] [Accepted: 06/20/2017] [Indexed: 11/18/2022]
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Current View on Osteogenic Differentiation Potential of Mesenchymal Stromal Cells Derived from Placental Tissues. Stem Cell Rev Rep 2016; 11:570-85. [PMID: 25381565 PMCID: PMC4493719 DOI: 10.1007/s12015-014-9569-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Mesenchymal stromal cells (MSC) isolated from human term placental tissues possess unique characteristics, including their peculiar immunomodulatory properties and their multilineage differentiation potential. The osteogenic differentiation capacity of placental MSC has been widely disputed, and continues to be an issue of debate. This review will briefly discuss the different MSC populations which can be obtained from different regions of human term placenta, along with their unique properties, focusing specifically on their osteogenic differentiation potential. We will present the strategies used to enhance osteogenic differentiation potential in vitro, such as through the selection of subpopulations more prone to differentiate, the modification of the components of osteo-inductive medium, and even mechanical stimulation. Accordingly, the applications of three-dimensional environments in vitro and in vivo, such as non-synthetic, polymer-based, and ceramic scaffolds, will also be discussed, along with results obtained from pre-clinical studies of placental MSC for the regeneration of bone defects and treatment of bone-related diseases.
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Baudequin T, Bedoui F, Dufresne M, Paullier P, Legallais C. Towards the Development and Characterization of an Easy Handling Sheet-Like Biohybrid Bone Substitute. Tissue Eng Part A 2015; 21:1895-905. [DOI: 10.1089/ten.tea.2014.0580] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Affiliation(s)
- Timothée Baudequin
- Sorbonne Universités, Université de Technologie de Compiègne, UMR CNRS 7338 Laboratoire de Biomécanique et Bioingénierie, Compiègne, France
| | - Fahmi Bedoui
- Sorbonne Universités, Université de Technologie de Compiègne, UMR CNRS 7337 Laboratoire de Mécanique Roberval, Compiègne, France
| | - Murielle Dufresne
- Sorbonne Universités, Université de Technologie de Compiègne, UMR CNRS 7338 Laboratoire de Biomécanique et Bioingénierie, Compiègne, France
| | - Patrick Paullier
- Sorbonne Universités, Université de Technologie de Compiègne, UMR CNRS 7338 Laboratoire de Biomécanique et Bioingénierie, Compiègne, France
| | - Cécile Legallais
- Sorbonne Universités, Université de Technologie de Compiègne, UMR CNRS 7338 Laboratoire de Biomécanique et Bioingénierie, Compiègne, France
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Su F, Liu SS, Ma JL, Wang DS, E LL, Liu HC. Enhancement of periodontal tissue regeneration by transplantation of osteoprotegerin-engineered periodontal ligament stem cells. Stem Cell Res Ther 2015; 6:22. [PMID: 25888745 PMCID: PMC4425908 DOI: 10.1186/s13287-015-0023-3] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Revised: 02/26/2015] [Accepted: 02/26/2015] [Indexed: 12/22/2022] Open
Abstract
Introduction The objective of the present study was to evaluate the capacity of a tissue-engineered complex of human osteoprotegerin (hOPG)-transfected periodontal ligament stem cells (PDLSCs) seeding on beta-tricalcium phosphate (β-TCP) to regenerate alveolar bone defects in New Zealand rabbits. Methods PDLSCs were isolated from rabbit periodontal ligament tissues and expanded in vitro to enrich PDLSC numbers, and their proliferative activities and differentiation capability were evaluated under specific induction conditions. Lentiviral vector containing hOPG and enhanced green fluorescent protein (EGFP) was constructed by using Gateway technology and transfected into rabbit PDLSCs. The expression of hOPG was determined with quantitative real-time reverse transcription-polymerase chain reaction and Western blot. The PDLSCs with or without engineered hOPG were seeded on β-TCP scaffolds prior to transplantation. Morphological characterization of cells and materials was done by scanning electron microscope. Twenty rabbits with alveolar bone defects were randomly allocated into four groups and transplanted with β-TCP, PDLSCs/β-TCP, and hOPG-transfected PDLSCs/β-TCP or were left untreated as a control. Animals were sacrificed 12 weeks after operation for histological observation and histomorphometric analysis. Results PDLSCs expressed STRO-1 and vementin and favored osteogenesis and adipogenesis in conditioned media. Expressions of hOPG were significantly upregulated after transfection of the lentiviral vector into PDLSCs. PDLSCs attached and spread well on β-TCP, and there was no significant difference in growth of PDLSCs on β-TCP between the hOPG transfection group and the non-transfection group. The histological observation and histomorphometric analysis showed that the hOPG-transfected PDLSCs/β-TCP complex exhibited an earlier mineralization and more bone formation inside the scaffold than control, β-TCP, and PDLSCs/β-TCP complexes. Implantation of hOPG-transfected PDLSCs contributed to new bone formation as determined by EGFP gene expression under circularly polarized light microscopy. Conclusions The present study demonstrated the feasibility of β-TCP scaffolds for primary PDLSC culture and expression of hOPG gene in vitro and in vivo, and hOPG-transfected PDLSCs could serve as a potential cell source for periodontal bone regeneration, which may shed light on the potential of systemic hOPG gene therapy in combination with PDLSC tissue engineering as a good candidate in periodontal tissue engineering for alveolar bone regeneration.
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Affiliation(s)
- Fang Su
- Institute of Stomatology, General Hospital of Chinese PLA, No. 28, Fuxing Road, Haidian District, Beijing, 100853, China. .,Department of Stomatology, The 306th Hospital of Chinese PLA, No.9 Anxiang Beili, Chaoyang District, Beijing, 100101, China.
| | - Shi-Sen Liu
- Institute of Stomatology, General Hospital of Chinese PLA, No. 28, Fuxing Road, Haidian District, Beijing, 100853, China. .,Department of Stomatology, Navy General Hospital of Chinese PLA, No. 6 Fucheng Road, Haidian District, Beijing, 100048, China.
| | - Jun-Li Ma
- Institute of Stomatology, General Hospital of Chinese PLA, No. 28, Fuxing Road, Haidian District, Beijing, 100853, China.
| | - Dong-Sheng Wang
- Institute of Stomatology, General Hospital of Chinese PLA, No. 28, Fuxing Road, Haidian District, Beijing, 100853, China.
| | - Ling-Ling E
- Institute of Stomatology, General Hospital of Chinese PLA, No. 28, Fuxing Road, Haidian District, Beijing, 100853, China.
| | - Hong-Chen Liu
- Institute of Stomatology, General Hospital of Chinese PLA, No. 28, Fuxing Road, Haidian District, Beijing, 100853, China.
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Comparison of three calcium phosphate bone graft substitutes from biomechanical, histological, and crystallographic perspectives using a rat posterolateral lumbar fusion model. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 45:82-8. [DOI: 10.1016/j.msec.2014.08.065] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2014] [Revised: 08/07/2014] [Accepted: 08/29/2014] [Indexed: 12/26/2022]
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Bone tissue engineering via nanostructured calcium phosphate biomaterials and stem cells. Bone Res 2014; 2:14017. [PMID: 26273526 PMCID: PMC4472121 DOI: 10.1038/boneres.2014.17] [Citation(s) in RCA: 187] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2014] [Revised: 07/25/2014] [Accepted: 07/29/2014] [Indexed: 02/05/2023] Open
Abstract
Tissue engineering is promising to meet the increasing need for bone regeneration. Nanostructured calcium phosphate (CaP) biomaterials/scaffolds are of special interest as they share chemical/crystallographic similarities to inorganic components of bone. Three applications of nano-CaP are discussed in this review: nanostructured calcium phosphate cement (CPC); nano-CaP composites; and nano-CaP coatings. The interactions between stem cells and nano-CaP are highlighted, including cell attachment, orientation/morphology, differentiation and in vivo bone regeneration. Several trends can be seen: (i) nano-CaP biomaterials support stem cell attachment/proliferation and induce osteogenic differentiation, in some cases even without osteogenic supplements; (ii) the influence of nano-CaP surface patterns on cell alignment is not prominent due to non-uniform distribution of nano-crystals; (iii) nano-CaP can achieve better bone regeneration than conventional CaP biomaterials; (iv) combining stem cells with nano-CaP accelerates bone regeneration, the effect of which can be further enhanced by growth factors; and (v) cell microencapsulation in nano-CaP scaffolds is promising for bone tissue engineering. These understandings would help researchers to further uncover the underlying mechanisms and interactions in nano-CaP stem cell constructs in vitro and in vivo, tailor nano-CaP composite construct design and stem cell type selection to enhance cell function and bone regeneration, and translate laboratory findings to clinical treatments.
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Lee K, Weir MD, Lippens E, Mehta M, Wang P, Duda GN, Kim WS, Mooney DJ, Xu HHK. Bone regeneration via novel macroporous CPC scaffolds in critical-sized cranial defects in rats. Dent Mater 2014; 30:e199-207. [PMID: 24768062 DOI: 10.1016/j.dental.2014.03.008] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2013] [Revised: 11/20/2013] [Accepted: 03/25/2014] [Indexed: 12/13/2022]
Abstract
OBJECTIVES Calcium phosphate cement (CPC) is promising for dental and craniofacial applications due to its ability to be injected or filled into complex-shaped bone defects and molded for esthetics, and its resorbability and replacement by new bone. The objective of this study was to investigate bone regeneration via novel macroporous CPC containing absorbable fibers, hydrogel microbeads and growth factors in critical-sized cranial defects in rats. METHODS Mannitol porogen and alginate hydrogel microbeads were incorporated into CPC. Absorbable fibers were used to provide mechanical reinforcement to CPC scaffolds. Six CPC groups were tested in rats: (1) control CPC without macropores and microbeads; (2) macroporous CPC+large fiber; (3) macroporous CPC+large fiber+nanofiber; (4) same as (3), but with rhBMP2 in CPC matrix; (5) same as (3), but with rhBMP2 in CPC matrix+rhTGF-β1 in microbeads; (6) same as (3), but with rhBMP2 in CPC matrix+VEGF in microbeads. Rats were sacrificed at 4 and 24 weeks for histological and micro-CT analyses. RESULTS The macroporous CPC scaffolds containing porogen, absorbable fibers and hydrogel microbeads had mechanical properties similar to cancellous bone. At 4 weeks, the new bone area fraction (mean±sd; n=5) in CPC control group was the lowest at (14.8±3.3)%, and that of group 6 (rhBMP2+VEGF) was (31.0±13.8)% (p<0.05). At 24 weeks, group 4 (rhBMP2) had the most new bone of (38.8±15.6)%, higher than (12.7±5.3)% of CPC control (p<0.05). Micro-CT revealed nearly complete bridging of the critical-sized defects with new bone for several macroporous CPC groups, compared to much less new bone formation for CPC control. SIGNIFICANCE Macroporous CPC scaffolds containing porogen, fibers and microbeads with growth factors were investigated in rat cranial defects for the first time. Macroporous CPCs had new bone up to 2-fold that of traditional CPC control at 4 weeks, and 3-fold that of traditional CPC at 24 weeks, and hence may be useful for dental, craniofacial and orthopedic applications.
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Affiliation(s)
- Kangwon Lee
- School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
| | - Michael D Weir
- Biomaterials & Tissue Engineering Division, Department of Endodontics, Prosthodontics and Operative Dentistry, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
| | - Evi Lippens
- School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
| | - Manav Mehta
- School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
| | - Ping Wang
- Biomaterials & Tissue Engineering Division, Department of Endodontics, Prosthodontics and Operative Dentistry, University of Maryland School of Dentistry, Baltimore, MD 21201, USA
| | - Georg N Duda
- Julius Wolff Institute, Charité - Universitätsmedizin Berlin and Berlin-Brandenburg Center for Regenerative Therapies, Berlin, Germany
| | - Woo S Kim
- School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
| | - David J Mooney
- School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
| | - Hockin H K Xu
- Biomaterials & Tissue Engineering Division, Department of Endodontics, Prosthodontics and Operative Dentistry, University of Maryland School of Dentistry, Baltimore, MD 21201, USA; Center for Stem Cell Biology and Regenerative Medicine, University of Maryland School of Medicine, Baltimore, MD 21201, USA; Marlene and Stewart Greenebaum Cancer Center, University of Maryland School of Medicine, Baltimore, MD 21201, USA; Department of Mechanical Engineering, University of Maryland, Baltimore County, MD 21250, USA.
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Ko CL, Chen JC, Tien YC, Hung CC, Wang JC, Chen WC. Osteoregenerative capacities of dicalcium phosphate-rich calcium phosphate bone cement. J Biomed Mater Res A 2014; 103:203-10. [DOI: 10.1002/jbm.a.35167] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2013] [Revised: 02/27/2014] [Accepted: 03/12/2014] [Indexed: 11/08/2022]
Affiliation(s)
- Chia-Ling Ko
- College of Dental Medicine; Kaohsiung Medical University; Department of Dentistry; Kaohsiung Medical University Hospital; Kaohsiung 807 Taiwan
- Department of Fiber and Composite Materials; Feng Chia University; Taichung 407 Taiwan
| | - Jian-Chih Chen
- College of Medicine; Kaohsiung Medical University; Department of Orthopaedics; Kaohsiung Medical University Hospital; Kaohsiung 807 Taiwan
| | - Yin-Chun Tien
- College of Medicine; Kaohsiung Medical University; Department of Orthopaedics; Kaohsiung Medical University Hospital; Kaohsiung 807 Taiwan
| | - Chun-Cheng Hung
- College of Dental Medicine; Kaohsiung Medical University; Department of Dentistry; Kaohsiung Medical University Hospital; Kaohsiung 807 Taiwan
| | - Jen-Chyan Wang
- College of Dental Medicine; Kaohsiung Medical University; Department of Dentistry; Kaohsiung Medical University Hospital; Kaohsiung 807 Taiwan
| | - Wen-Cheng Chen
- Department of Fiber and Composite Materials; Feng Chia University; Taichung 407 Taiwan
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Hesaraki S, Nezafati N. In vitro biocompatibility of chitosan/hyaluronic acid-containing calcium phosphate bone cements. Bioprocess Biosyst Eng 2014; 37:1507-16. [DOI: 10.1007/s00449-013-1122-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2013] [Accepted: 12/24/2013] [Indexed: 12/20/2022]
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Dorozhkin SV. Self-setting calcium orthophosphate formulations. J Funct Biomater 2013; 4:209-311. [PMID: 24956191 PMCID: PMC4030932 DOI: 10.3390/jfb4040209] [Citation(s) in RCA: 125] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2013] [Revised: 10/18/2013] [Accepted: 10/21/2013] [Indexed: 01/08/2023] Open
Abstract
In early 1980s, researchers discovered self-setting calcium orthophosphate cements, which are bioactive and biodegradable grafting bioceramics in the form of a powder and a liquid. After mixing, both phases form pastes, which set and harden forming either a non-stoichiometric calcium deficient hydroxyapatite or brushite. Since both of them are remarkably biocompartible, bioresorbable and osteoconductive, self-setting calcium orthophosphate formulations appear to be promising bioceramics for bone grafting. Furthermore, such formulations possess excellent molding capabilities, easy manipulation and nearly perfect adaptation to the complex shapes of bone defects, followed by gradual bioresorption and new bone formation. In addition, reinforced formulations have been introduced, which might be described as calcium orthophosphate concretes. The discovery of self-setting properties opened up a new era in the medical application of calcium orthophosphates and many commercial trademarks have been introduced as a result. Currently such formulations are widely used as synthetic bone grafts, with several advantages, such as pourability and injectability. Moreover, their low-temperature setting reactions and intrinsic porosity allow loading by drugs, biomolecules and even cells for tissue engineering purposes. In this review, an insight into the self-setting calcium orthophosphate formulations, as excellent bioceramics suitable for both dental and bone grafting applications, has been provided.
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Ryu YJ, Seol HS, Cho TJ, Kwon TJ, Jang SJ, Cho J. Comparison of the Ultrastructural and Immunophenotypic Characteristics of Human Umbilical Cord-derived Mesenchymal Stromal Cells and in Situ Cells in Wharton’s Jelly. Ultrastruct Pathol 2013; 37:196-203. [DOI: 10.3109/01913123.2013.772268] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Yu L, Li Y, Zhao K, Tang Y, Cheng Z, Chen J, Zang Y, Wu J, Kong L, Liu S, Lei W, Wu Z. A novel injectable calcium phosphate cement-bioactive glass composite for bone regeneration. PLoS One 2013; 8:e62570. [PMID: 23638115 PMCID: PMC3636220 DOI: 10.1371/journal.pone.0062570] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2013] [Accepted: 03/22/2013] [Indexed: 02/01/2023] Open
Abstract
Background Calcium phosphate cement (CPC) can be molded or injected to form a scaffold in situ, which intimately conforms to complex bone defects. Bioactive glass (BG) is known for its unique ability to bond to living bone and promote bone growth. However, it was not until recently that literature was available regarding CPC-BG applied as an injectable graft. In this paper, we reported a novel injectable CPC-BG composite with improved properties caused by the incorporation of BG into CPC. Materials and Methods The novel injectable bioactive cement was evaluated to determine its composition, microstructure, setting time, injectability, compressive strength and behavior in a simulated body fluid (SBF). The in vitro cellular responses of osteoblasts and in vivo tissue responses after the implantation of CPC-BG in femoral condyle defects of rabbits were also investigated. Results CPC-BG possessed a retarded setting time and markedly better injectability and mechanical properties than CPC. Moreover, a new Ca-deficient apatite layer was deposited on the composite surface after immersing immersion in SBF for 7 days. CPC-BG samples showed significantly improved degradability and bioactivity compared to CPC in simulated body fluid (SBF). In addition, the degrees of cell attachment, proliferation and differentiation on CPC-BG were higher than those on CPC. Macroscopic evaluation, histological evaluation, and micro-computed tomography (micro-CT) analysis showed that CPC-BG enhanced the efficiency of new bone formation in comparison with CPC. Conclusions A novel CPC-BG composite has been synthesized with improved properties exhibiting promising prospects for bone regeneration.
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Affiliation(s)
- Long Yu
- Institute of Orthopedics, Xijing Hospital, The Fourth Military Medical University, Xi’an, Shaanxi Province, People’s Republic of China
| | - Yang Li
- Institute of Orthopedics, Xijing Hospital, The Fourth Military Medical University, Xi’an, Shaanxi Province, People’s Republic of China
| | - Kang Zhao
- School of Materials and Engineering, Xi’an University of Technology, Xi’an, Shaanxi Province, People’s Republic of China
| | - Yufei Tang
- School of Materials and Engineering, Xi’an University of Technology, Xi’an, Shaanxi Province, People’s Republic of China
| | - Zhe Cheng
- School of Materials and Engineering, Xi’an University of Technology, Xi’an, Shaanxi Province, People’s Republic of China
| | - Jun Chen
- Institute of Orthopedics, Xijing Hospital, The Fourth Military Medical University, Xi’an, Shaanxi Province, People’s Republic of China
| | - Yuan Zang
- Institute of Orthopedics, Xijing Hospital, The Fourth Military Medical University, Xi’an, Shaanxi Province, People’s Republic of China
| | - Jianwei Wu
- Institute of Orthopedics, Xijing Hospital, The Fourth Military Medical University, Xi’an, Shaanxi Province, People’s Republic of China
| | - Liang Kong
- Department of Oral and Maxillofacial Surgery, School of Stomatology, The Fourth Military Medical University, Xi’an, Shaanxi Province, People’s Republic of China
| | - Shuai Liu
- Institute of Orthopedics, Xijing Hospital, The Fourth Military Medical University, Xi’an, Shaanxi Province, People’s Republic of China
| | - Wei Lei
- Institute of Orthopedics, Xijing Hospital, The Fourth Military Medical University, Xi’an, Shaanxi Province, People’s Republic of China
- * E-mail: (WL); (ZW)
| | - Zixiang Wu
- Institute of Orthopedics, Xijing Hospital, The Fourth Military Medical University, Xi’an, Shaanxi Province, People’s Republic of China
- * E-mail: (WL); (ZW)
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Tamimi F, Nihouannen DL, Eimar H, Sheikh Z, Komarova S, Barralet J. The effect of autoclaving on the physical and biological properties of dicalcium phosphate dihydrate bioceramics: brushite vs. monetite. Acta Biomater 2012; 8:3161-9. [PMID: 22522010 DOI: 10.1016/j.actbio.2012.04.025] [Citation(s) in RCA: 90] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2012] [Revised: 04/11/2012] [Accepted: 04/13/2012] [Indexed: 11/25/2022]
Abstract
Dicalcium phosphate dihydrate (brushite) is an osteoconductive biomaterial with great potential as a bioresorbable cement for bone regeneration. Preset brushite cement can be dehydrated into dicalcium phosphate anhydrous (monetite) bioceramics by autoclaving. This heat treatment results in changes in the physical characteristics of the material, improving in vivo bioresorption. This property is a great advantage in bone regeneration; however, it is not known how autoclaving brushite preset cement might improve its capacity to regenerate bone. This study was designed to compare brushite bioceramics with monetite bioceramics in terms of physical characteristics in vitro, and in vivo performance upon bone implantation. In this study we observed that monetite bioceramics prepared by autoclaving preset brushite cements had higher porosity, interconnected porosity and specific surface area than their brushite precursors. In vitro cell culture experiments revealed that bone marrow cells expressed higher levels of osteogenic genes Runx2, Opn, and Alp when the cells were cultured on monetite ceramics rather than on brushite ones. In vivo experiments revealed that monetite bioceramics resorbed faster than brushite ones and were more infiltrated with newly formed bone. In summary, autoclaving preset brushite cements results in a material with improved properties for bone regeneration procedures.
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Umbilical cord-derived mesenchymal stem cells: strategies, challenges, and potential for cutaneous regeneration. Front Med 2012; 6:41-7. [DOI: 10.1007/s11684-012-0175-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2011] [Accepted: 12/02/2011] [Indexed: 12/24/2022]
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Szpalski C, Barbaro M, Sagebin F, Warren SM. Bone tissue engineering: current strategies and techniques--part II: Cell types. TISSUE ENGINEERING PART B-REVIEWS 2012; 18:258-69. [PMID: 22224439 DOI: 10.1089/ten.teb.2011.0440] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Bone repair and regeneration is a dynamic process that involves a complex interplay between the (1) ground substance; (2) cells; and (3) milieu. Each constituent is integral to the final product, but it is often helpful to consider each component individually. While bone tissue engineering has capitalized on a number of breakthrough technologies, one of the most valued advancements is the incorporation of mesenchymal stem cells (SCs) into bone tissue engineering applications. With this new idea, however, came new found problems of guiding SC differentiation. Moreover, investigators are still working to understand which SCs source produces optimal bone formation in vitro and in vivo. Bone marrow-derived mesenchymal SCs and adipose-derived SCs have been researched most extensively, but other SC sources, including dental pulp, blood, umbilical cord blood, epithelial cells reprogrammed to become induced pluripotent SCs, among others, are being investigated. In Part II of this review series, we discuss the variety of cell types (e.g., osteocytes, osteoblasts, osteoclasts, chondrocytes, mesenchymal SCs, and vasculogenic cells) important in bone tissue engineering.
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Affiliation(s)
- Caroline Szpalski
- Department of Plastic Surgery, New York University Langone Medical Center, New York, New York 10016, USA
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Chen W, Zhou H, Tang M, Weir MD, Bao C, Xu HHK. Gas-foaming calcium phosphate cement scaffold encapsulating human umbilical cord stem cells. Tissue Eng Part A 2011; 18:816-27. [PMID: 22011243 DOI: 10.1089/ten.tea.2011.0267] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Tissue engineering approaches are promising to meet the increasing need for bone regeneration. Calcium phosphate cement (CPC) can be injected and self-set to form a scaffold with excellent osteoconductivity. The objectives of this study were to develop a macroporous CPC-chitosan-fiber construct containing alginate-fibrin microbeads encapsulating human umbilical cord mesenchymal stem cells (hUCMSCs) and to investigate hUCMSC release from the degrading microbeads and proliferation inside the porous CPC construct. The hUCMSC-encapsulated microbeads were completely wrapped inside the CPC paste, with the gas-foaming porogen creating macropores in CPC to provide for access to culture media. Increasing the porogen content in CPC significantly increased the cell viability, from 49% of live cells in CPC with 0% porogen to 86% of live cells in CPC with 15% porogen. The alginate-fibrin microbeads started to degrade and release the cells inside CPC at 7 days. The released cells started to proliferate inside the macroporous CPC construct. The live cell number inside CPC increased from 270 cells/mm(2) at 1 day to 350 cells/mm(2) at 21 days. The pore volume fraction of CPC increased from 46.8% to 78.4% using the gas-foaming method, with macropore sizes of approximately 100 to 400 μm. The strength of the CPC-chitosan-fiber scaffold at 15% porogen was 3.8 MPa, which approximated the reported 3.5 MPa for cancellous bone. In conclusion, a novel gas-foaming macroporous CPC construct containing degradable alginate-fibrin microbeads was developed that encapsulated hUCMSCs. The cells had good viability while wrapped inside the porous CPC construct. The degradable microbeads in CPC quickly released the cells, which proliferated over time inside the porous CPC. Self-setting, strong CPC with alginate-fibrin microbeads for stem cell delivery is promising for bone tissue engineering applications.
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Affiliation(s)
- Wenchuan Chen
- Biomaterials and Tissue Engineering Division, Department of Endodontics, Prosthodontics and Operative Dentistry, University of Maryland Dental School, Baltimore, Maryland 21201, USA
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Bao C, Chen W, Weir MD, Thein-Han W, Xu HHK. Effects of electrospun submicron fibers in calcium phosphate cement scaffold on mechanical properties and osteogenic differentiation of umbilical cord stem cells. Acta Biomater 2011; 7:4037-44. [PMID: 21763791 DOI: 10.1016/j.actbio.2011.06.046] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2011] [Revised: 06/22/2011] [Accepted: 06/27/2011] [Indexed: 11/19/2022]
Abstract
Fibrous scaffolds are promising for tissue engineering because of the high surface area and fibrous features mimicking the extracellular matrix in vivo. Calcium phosphate cements (CPCs) can be injected and self-set in the bone defect. A literature search revealed that there have been no reports on stem cell seeding on CPC containing electrospun submicron fibers. The objective of this study was to investigate for the first time the effects of electrospun fibers in CPC on mechanical properties and human umbilical cord mesenchymal stem cell (hUCMSC) proliferation, osteogenic differentiation and mineralization. Poly(D,L-lactide-co-glycolide) fibers were made via an electrospinning technique to yield an average fiber diameter of 650 nm. The fibers were incorporated into CPC consisting of tetracalcium phosphate, dicalcium phosphate anhydrous and chitosan lactate. Fiber volume fractions were 0%, 2.5%, 5% and 10%. CPC with 10% fibers had a flexural strength that was twice that of CPC without fibers, and a work-of-fracture (toughness) that was an order of magnitude larger than that of CPC without fibers. hUCMSCs proliferated rapidly and synthesized bone minerals when attached to the electrospun fiber-CPC scaffolds. Alkaline phosphatase, osteocalcin and collagen I expressions of hUCMSCs were doubled, while mineralization was increased by 40%, when fiber volume fraction in CPC was increased from 0% to 10%. The enhanced cell function was attributed to the high surface area and biomimetic features of the fiber-CPC scaffold. In conclusion, incorporating submicron fibers into CPC greatly improved the strength and toughness of the CPC. Creating submicron fibrous features in CPC was a useful method for enhancing the osteogenic differentiation and mineralization of stem cells. The novel electrospun fiber-CPC-hUCMSC construct is promising for stem cell delivery and bone tissue engineering.
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Affiliation(s)
- Chongyun Bao
- Biomaterials & Tissue Engineering Division, Department of Endodontics, Prosthodontics and Operative Dentistry, University of Maryland Dental School, Baltimore, MD 21201, USA
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Xue G, He M, Zhao J, Chen Y, Tian Y, Zhao B, Niu B. Intravenous umbilical cord mesenchymal stem cell infusion for the treatment of combined malnutrition nonunion of the humerus and radial nerve injury. Regen Med 2011; 6:733-41. [DOI: 10.2217/rme.11.83] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Nonunion and nerve injury are the most severe and common complications of bone fracture treatments. There is still no ideal therapy for these two complications. In this report, we first applied umbilical cord mesenchymal stem cell (UC-MSC) therapy to one patient with both nonunion and nerve injury, and observed the therapeutic effects. UC-MSCs were produced and expanded according to a clinical-grade technique using serum-free medium enriched in human platelet lysate. Flow cytometry was performed to evaluate the purity of UC-MSCs, which were then intravenously injected. At 60 days postinjection, clinical examinations were performed to evaluate the therapeutic effects. Compared with before treatment, the patient’s nerve reflex was present, and their muscle tone and strength increased, and x-ray and electromyography analysis further showed that the fracture gap disappeared and the nerve conduction velocity increased with shorter latency and higher amplitude. Furthermore, the clinical evolution was favorable and no side effects were observed during the 1-year follow-up. Overall, this novel treatment might open up a new strategy for the treatment of bone fracture complications.
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Affiliation(s)
- Guofang Xue
- Department of Endocrinology, The Second Clinical Medical College, Shanxi Medical University, Taiyuan, China
| | - Meilan He
- Medicine Department, University of Southern California, Los Angeles, CA, USA
| | - Jie Zhao
- Department of Biochemistry & Molecular Biology, Shanxi Medical University, Taiyuan, China; Biotechnology Research Laboratory, Capital Institute of Pediatrics, Beijing, China
| | - Yan Chen
- Department of Biochemistry & Molecular Biology, Shanxi Medical University, Taiyuan, China; Biotechnology Research Laboratory, Capital Institute of Pediatrics, Beijing, China
| | - Yun Tian
- Department of Orthopedics, The Third Affiliated Hospital, Peking University, Beijing, China
| | - Baozhen Zhao
- Department of Endocrinology, The Second Clinical Medical College, Shanxi Medical University, Taiyuan, China
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Zhou H, Xu HHK. The fast release of stem cells from alginate-fibrin microbeads in injectable scaffolds for bone tissue engineering. Biomaterials 2011; 32:7503-13. [PMID: 21757229 DOI: 10.1016/j.biomaterials.2011.06.045] [Citation(s) in RCA: 141] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2011] [Accepted: 06/19/2011] [Indexed: 10/17/2022]
Abstract
Stem cell-encapsulating hydrogel microbeads of several hundred microns in size suitable for injection, that could quickly degrade to release the cells, are currently unavailable. The objectives of this study were to: (1) develop oxidized alginate-fibrin microbeads encapsulating human umbilical cord mesenchymal stem cells (hUCMSCs); (2) investigate microbead degradation, cell release, and osteogenic differentiation of the released cells for the first time. Three types of microbeads were fabricated to encapsulate hUCMSCs: (1) Alginate microbeads; (2) oxidized alginate microbeads; (3) oxidized alginate-fibrin microbeads. Microbeads with sizes of about 100-500 μm were fabricated with 1 × 10(6) hUCMSCs/mL of alginate. For the alginate group, there was little microbead degradation, with very few cells released at 21 d. For oxidized alginate, the microbeads started to slightly degrade at 14 d. In contrast, the oxidized alginate-fibrin microbeads started to degrade at 4 d and released the cells. At 7 d, the number of released cells greatly increased and showed a healthy polygonal morphology. At 21 d, the oxidized alginate-fibrin group had a live cell density that was 4-fold that of the oxidized alginate group, and 15-fold that of the alginate group. The released cells had osteodifferentiation, exhibiting highly elevated bone marker gene expressions of ALP, OC, collagen I, and Runx2. Alizarin staining confirmed the synthesis of bone minerals by hUCMSCs, with the mineral concentration at 21 d being 10-fold that at 7 d. In conclusion, fast-degradable alginate-fibrin microbeads with hUCMSC encapsulation were developed that could start to degrade and release the cells at 4 d. The released hUCMSCs had excellent proliferation, osteodifferentiation, and bone mineral synthesis. The alginate-fibrin microbeads are promising to deliver stem cells inside injectable scaffolds to promote tissue regeneration.
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Affiliation(s)
- Hongzhi Zhou
- Biomaterials & Tissue Engineering Division, Department of Endodontics, Prosthodontics and Operative Dentistry, University of Maryland Dental School, Baltimore, MD 21201, USA
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Zhou H, Weir MD, Xu HHK. Effect of cell seeding density on proliferation and osteodifferentiation of umbilical cord stem cells on calcium phosphate cement-fiber scaffold. Tissue Eng Part A 2011; 17:2603-13. [PMID: 21745111 DOI: 10.1089/ten.tea.2011.0048] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Calcium phosphate cement (CPC) can fill complex-shaped bone defects and set in situ to form a scaffold with intimate adaptation to neighboring bone. The objectives of this study were to determine (1) the effects of fiber length and alginate microbead volume fraction on CPC mechanical properties, and (2) the effect of cell seeding density of human umbilical cord mesenchymal stem cells (hUCMSCs) on their proliferation and osteodifferentiation on CPC. Adding microbeads to CPC degraded the strength. However, increasing the fiber length improved the mechanical properties. Strength and elastic modulus of CPC-microbead-fiber scaffold matched those reported for cancellous bone. When the cell seeding density was increased from 50k to 300k, the cell viability, osteodifferentiation, and bone mineral synthesis also increased. When the seeding density was further increased to 500k, the osteodifferentiation and mineralization decreased. Hence, the 300k seeding density was optimal for CPC-microbead-fiber under the specified conditions. At day 8, alkaline phosphatase (ALP) gene expression of hUCMSCs with seeding density of 300k was threefold the ALP at 150k, and 200-fold the ALP at 50k. At day 14, osteocalcin and runt-related transcription factor 2 with cell seeding density of 300k was fourfold those at 50k. At day 14, mineralization by hUCMSCs at seeding density of 300k was 5-fold the mineralization at 150k, and 25-fold that at 50k. In conclusion, the effect of stem cell seeding density on CPC was determined for the first time. At low cell densities, cell viability and mineralization increased with seeding density. However, a higher seeding density was not necessarily better, and an optimal seeding density on CPC resulted in the best osteodifferentiation and mineralization. The stem cell-seeded CPC-fiber scaffold with excellent osteodifferentiation and mineralization is promising for orthopedic and craniofacial applications.
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Affiliation(s)
- Hongzhi Zhou
- Department of Endodontics, Prosthodontics, and Operative Dentistry, Biomaterials and Tissue Engineering Division, University of Maryland Dental School, Baltimore, Maryland 21201, USA
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Wang L, Ott L, Seshareddy K, Weiss ML, Detamore MS. Musculoskeletal tissue engineering with human umbilical cord mesenchymal stromal cells. Regen Med 2011; 6:95-109. [PMID: 21175290 DOI: 10.2217/rme.10.98] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Multipotent mesenchymal stromal cells (MSCs) hold tremendous promise for tissue engineering and regenerative medicine, yet with so many sources of MSCs, what are the primary criteria for selecting leading candidates? Ideally, the cells will be multipotent, inexpensive, lack donor site morbidity, donor materials should be readily available in large numbers, immunocompatible, politically benign and expandable in vitro for several passages. Bone marrow MSCs do not meet all of these criteria and neither do embryonic stem cells. However, a promising new cell source is emerging in tissue engineering that appears to meet these criteria: MSCs derived from Wharton's jelly of umbilical cord MSCs. Exposed to appropriate conditions, umbilical cord MSCs can differentiate in vitro along several cell lineages such as the chondrocyte, osteoblast, adipocyte, myocyte, neuronal, pancreatic or hepatocyte lineages. In animal models, umbilical cord MSCs have demonstrated in vivo differentiation ability and promising immunocompatibility with host organs/tissues, even in xenotransplantation. In this article, we address their cellular characteristics, multipotent differentiation ability and potential for tissue engineering with an emphasis on musculoskeletal tissue engineering.
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Affiliation(s)
- Limin Wang
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan, MI 48109, USA
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Forraz N, McGuckin CP. The umbilical cord: a rich and ethical stem cell source to advance regenerative medicine. Cell Prolif 2011; 44 Suppl 1:60-9. [PMID: 21481046 DOI: 10.1111/j.1365-2184.2010.00729.x] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Science and medicine place a lot of hope in the development of stem cell research and regenerative medicine. This review will define the concept of regenerative medicine and focus on an abundant stem cell source - neonatal tissues such as the umbilical cord. Umbilical cord blood has been used clinically for over 20 years as a cell source for haematopoietic stem cell transplantation. Beyond this, cord blood and umbilical cord-derived stem cells have demonstrated potential for pluripotent lineage differentiation (liver, pancreatic, neural tissues and more) in vitro and in vivo. This promising research has opened up a new era for utilization of neonatal stem cells, now used beyond haematology in clinical trials for autoimmune disorders, cerebral palsy or type I diabetes.
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Affiliation(s)
- N Forraz
- CTI-LYON, Cell Therapy Research Institute, Parc Technologique de Lyon St Priest, France
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