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de Sousa BM, Correia CR, Ferreira JAF, Mano JF, Furlani EP, Soares Dos Santos MP, Vieira SI. Capacitive interdigitated system of high osteoinductive/conductive performance for personalized acting-sensing implants. NPJ Regen Med 2021; 6:80. [PMID: 34815414 PMCID: PMC8611088 DOI: 10.1038/s41536-021-00184-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Accepted: 10/19/2021] [Indexed: 11/15/2022] Open
Abstract
Replacement orthopedic surgeries are among the most common surgeries worldwide, but clinically used passive implants cannot prevent failure rates and inherent revision arthroplasties. Optimized non-instrumented implants, resorting to preclinically tested bioactive coatings, improve initial osseointegration but lack long-term personalized actuation on the bone-implant interface. Novel bioelectronic devices comprising biophysical stimulators and sensing systems are thus emerging, aiming for long-term control of peri-implant bone growth through biointerface monitoring. These acting-sensing dual systems require high frequency (HF) operations able to stimulate osteoinduction/osteoconduction, including matrix maturation and mineralization. A sensing-compatible capacitive stimulator of thin interdigitated electrodes and delivering an electrical 60 kHz HF stimulation, 30 min/day, is here shown to promote osteoconduction in pre-osteoblasts and osteoinduction in human adipose-derived mesenchymal stem cells (hASCs). HF stimulation through this capacitive interdigitated system had significant effects on osteoblasts' collagen-I synthesis, matrix, and mineral deposition. A proteomic analysis of microvesicles released from electrically-stimulated osteoblasts revealed regulation of osteodifferentiation and mineralization-related proteins (e.g. Tgfb3, Ttyh3, Itih1, Aldh1a1). Proteomics data are available via ProteomeXchange with the identifier PXD028551. Further, under HF stimulation, hASCs exhibited higher osteogenic commitment and enhanced hydroxyapatite deposition. These promising osteoinductive/conductive capacitive stimulators will integrate novel bioelectronic implants able to monitor the bone-implant interface and deliver personalized stimulation to peri-implant tissues.
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Affiliation(s)
- Bárbara M de Sousa
- Department of Medical Sciences, Institute of Biomedicine (iBiMED), University of Aveiro, 3810-193, Aveiro, Portugal
| | - Clara R Correia
- Department of Chemistry, CICECO - Aveiro Institute of Materials, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Jorge A F Ferreira
- Department of Mechanical Engineering, Centre for Mechanical Technology & Automation (TEMA), University of Aveiro, 3810-193, Aveiro, Portugal
| | - João F Mano
- Department of Chemistry, CICECO - Aveiro Institute of Materials, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Edward P Furlani
- Department of Chemical and Biological Engineering, Department of Electrical Engineering, University at Buffalo (SUNY), Buffalo, NY, 14260, USA
| | - Marco P Soares Dos Santos
- Department of Mechanical Engineering, Centre for Mechanical Technology & Automation (TEMA), University of Aveiro, 3810-193, Aveiro, Portugal.
- Faculty of Engineering, Associated Laboratory for Energy, Transports and Aeronautics (LAETA), University of Porto, 4200-465, Porto, Portugal.
| | - Sandra I Vieira
- Department of Medical Sciences, Institute of Biomedicine (iBiMED), University of Aveiro, 3810-193, Aveiro, Portugal.
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2
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He R, Lu Y, Ren J, Wang Z, Huang J, Zhu L, Wang K. Decreased fibrous encapsulation and enhanced osseointegration in vitro by decorin-modified titanium surface. Colloids Surf B Biointerfaces 2017; 155:17-24. [DOI: 10.1016/j.colsurfb.2017.03.055] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Revised: 03/21/2017] [Accepted: 03/30/2017] [Indexed: 01/01/2023]
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Kim EC, Leesungbok R, Lee SW, Hong JY, Ko EJ, Ahn SJ. Effects of static magnetic fields on bone regeneration of implants in the rabbit: micro-CT, histologic, microarray, and real-time PCR analyses. Clin Oral Implants Res 2016; 28:396-405. [PMID: 26972335 DOI: 10.1111/clr.12812] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/24/2016] [Indexed: 11/28/2022]
Abstract
OBJECTIVES The aim of this study was to investigate the effects of static magnetic fields (SMFs) on bone regeneration around titanium implants by μCT, histologic analysis, microarrays, and quantitative real-time PCR (qRT-PCR). MATERIALS AND METHODS Neodymium magnets provided the source of SMFs, the specimens were grade 5 titanium implants, and the animals were twenty-seven adult male New Zealand white rabbits. These implants were divided into six groups according to the presence of a magnet and predetermined healing period (1, 4, and 8 weeks). Each group comprised six specimens for μCT (n = 6) and histologic examination, and three specimens (n = 3) for microarrays and qRT-PCR, yielding a total of 54 specimens. RESULTS The μCT data showed that SMFs increased bone volume fraction (bone volume/total volume, BV/TV), trabecular number (Tb.N), and trabecular thickness (Tb.Th). Histologic observation indicated that SMFs promoted new bone formation and direct bony contact with implants. Microarray analysis identified 293 genes upregulated (>twofold) in response to SMFs. The upregulated genes included extracellular matrix (ECM)-related genes (COL10A1, COL9A1, and COL12A1) and growth factor (GF)-related genes (CTGF and PDGFD), and the upregulation was confirmed by qRT-PCR. Gene Ontology (GO) and pathway analysis revealed the involvement of the mitogen-activated protein kinase (MAPK), Wnt, and PPAR-gamma signaling pathways in implant healing. CONCLUSIONS μCT, histology, microarrays, and real-time PCR indicate that SMFs could be an effective approach to improving bone regeneration around dental implants.
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Affiliation(s)
- Eun-Cheol Kim
- Department of Oral and Maxillofacial Pathology, School of Dentistry and Institute of Oral Biology, Kyung Hee University, Seoul, Korea
| | - Richard Leesungbok
- Department of Biomaterials & Prosthodontics, School of Dentistry, Kyung Hee University, Gangdong, Korea
| | - Suk-Won Lee
- Department of Biomaterials & Prosthodontics, School of Dentistry, Kyung Hee University, Gangdong, Korea
| | - Ji-Youn Hong
- Department of Periodontology, School of Dentistry, Kyung Hee University, Seoul, Korea
| | - Eun-Jin Ko
- Department of Biomaterials & Prosthodontics, School of Dentistry, Kyung Hee University, Gangdong, Korea
| | - Su-Jin Ahn
- Department of Biomaterials & Prosthodontics, School of Dentistry, Kyung Hee University, Gangdong, Korea
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Taniguchi Y, Kakura K, Yamamoto K, Kido H, Yamazaki J. Accelerated Osteogenic Differentiation and Bone Formation on Zirconia with Surface Grooves Created with Fiber Laser Irradiation. Clin Implant Dent Relat Res 2015; 18:883-894. [DOI: 10.1111/cid.12366] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Yusuke Taniguchi
- Department of Oral Rehabilitation; Fukuoka Dental College; Fukuoka Japan
| | - Kae Kakura
- Department of Oral Rehabilitation; Fukuoka Dental College; Fukuoka Japan
| | - Katsuki Yamamoto
- Department of Oral Rehabilitation; Fukuoka Dental College; Fukuoka Japan
| | - Hirofumi Kido
- Department of Oral Rehabilitation; Fukuoka Dental College; Fukuoka Japan
| | - Jun Yamazaki
- Department of Physiological Science & Molecular Biology; Fukuoka Dental College; Fukuoka Japan
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5
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TOMOAIA GHEORGHE, PASCA ROXANADIANA. On the Collagen Mineralization. A Review. CLUJUL MEDICAL (1957) 2015; 88:15-22. [PMID: 26528042 PMCID: PMC4508610 DOI: 10.15386/cjmed-359] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Accepted: 12/17/2014] [Indexed: 01/19/2023]
Abstract
Collagen mineralization (CM) is a challenging process that has received a lot of attention in the past years. Among the reasons for this interest, the key role is the importance of collagen and hydroxyapatite in natural bone, as major constituents. Different protocols of mineralization have been developed, specially using simulated body fluid (SBF) and many methods have been used to characterize the systems obtained, starting with methods of determining the mineral content (XRD, FTIR, Raman, High-Resolution Spectral Ultrasound Imaging), continuing with imaging methods (AFM, TEM, SEM, Fluorescence Microscopy), thermal analysis (DSC and TGA), evaluation of the mechanical and biological properties, including statistical methods and molecular modeling. In spite of the great number of studies regarding collagen mineralization, its mechanism, both in vivo and in vitro, is not completely understood. Some of the methods used in vitro and investigation methods are reviewed here.
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Affiliation(s)
- GHEORGHE TOMOAIA
- Orthopedic Department, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
| | - ROXANA-DIANA PASCA
- Orthopedic Department, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj-Napoca, Romania
- Chemical Engineering Department, Babes-Bolyai University of Cluj-Napoca, Romania
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6
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Krząkała A, Służalska K, Widziołek M, Szade J, Winiarski A, Dercz G, Kazek A, Tylko G, Michalska J, Iwaniak A, Osyczka AM, Simka W. Formation of bioactive coatings on a Ti–6Al–7Nb alloy by plasma electrolytic oxidation. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2012.07.075] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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7
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Koo KT, Lee SW, Lee MH, Kim KH, Jung SH, Kang YG. Time-dependent expression of osteoblast marker genes in human primary cells cultured on microgrooved titanium substrata. Clin Oral Implants Res 2013; 25:714-22. [DOI: 10.1111/clr.12131] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/17/2013] [Indexed: 11/29/2022]
Affiliation(s)
- Ki-Tae Koo
- Department of Periodontology and Dental Research Institute; School of Dentistry; Seoul National University; Seoul Republic of Korea
| | - Suk W. Lee
- Department of Biomaterials & Prosthodontics; Kyung Hee University Hospital at Gangdong; Institute of Oral Biology; School of Dentistry; Kyung Hee University; Seoul Republic of Korea
| | - Myung-Hyun Lee
- Green Ceramics Division; Korea Institute of Ceramic Engineering and Technology; Seoul Republic of Korea
| | - Kyung H. Kim
- Core Research Laboratory; Clinical Research Institute; Kyung Hee University Hospital at Gangdong; Seoul Republic of Korea
| | - Su H. Jung
- Core Research Laboratory; Clinical Research Institute; Kyung Hee University Hospital at Gangdong; Seoul Republic of Korea
| | - Yoon G. Kang
- Department of Orthodontics; Kyung Hee University Hospital at Gangdong; Institute of Oral Biology; School of Dentistry; Kyung Hee University; Seoul Republic of Korea
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8
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Lee MH, Kang JH, Lee SW. The significance of differential expression of genes and proteins in human primary cells caused by microgrooved biomaterial substrata. Biomaterials 2012; 33:3216-34. [PMID: 22285466 DOI: 10.1016/j.biomaterials.2012.01.034] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2012] [Accepted: 01/14/2012] [Indexed: 01/18/2023]
Abstract
We demonstrate that etched microgrooves, with truncated V-shape in cross-section and subsequent acid etching, on titanium substrata alter the expression of various genes and proteins in human primary cells. Etched microgrooves with 30 or 60 μm width and 10 μm depth promoted human gingival fibroblast proliferation and significantly enhanced the osteoblast differentiation of human bone marrow-derived mesenchymal stem cells and human periodontal ligament cells by inducing differential expression of various genes involved in cell adhesion, migration, proliferation, mitosis, cytoskeletal reorganization, translation initiation, vesicular trafficking, proton transportation, transforming growth factor-β signaling, mitogen-activated protein kinase signaling, simvastatin's anabolic effect on bone, inhibitory guanine nucleotide binding protein (G protein)'s action, sumoylation pathway, survival/apoptosis, mitochondrial distribution, type I collagen production, osteoblast differentiation, and bone remodeling that were verified by the differential display PCR and quantitative real-time PCR. The most influential genes on the enhancement of fibroblast proliferation or osteoblast differentiation were determined by multiple regression analysis, and the expression of relevant proteins was confirmed by western blotting and protein quantitation.
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Affiliation(s)
- Myung Hyun Lee
- Green Ceramics Division, Korea Institute of Ceramic Engineering and Technology, 77 10-gil, Digital-ro, Geumcheon-gu, Seoul 153-801, Republic of Korea
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9
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Mendonça DBS, Miguez PA, Mendonça G, Yamauchi M, Aragão FJL, Cooper LF. Titanium surface topography affects collagen biosynthesis of adherent cells. Bone 2011; 49:463-72. [PMID: 21549232 DOI: 10.1016/j.bone.2011.04.019] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2011] [Revised: 03/25/2011] [Accepted: 04/20/2011] [Indexed: 11/21/2022]
Abstract
Collagen-dependent microstructure and physicochemical properties of newly formed bone around implant surfaces represent key determinants of implant biomechanics. This study investigated the effects of implant surface topography on collagen biosynthesis of adherent human mesenchymal stem cells (hMSCs). hMSCs were grown for 0 to 42 days on titanium disks (20.0 × 1.0 mm) with smooth or rough surfaces. Cell attachment and spreading were evaluated by incubating cells with Texas-Red-conjugated phalloidin antibody. Quantitative real-time PCR was used to measure the mRNA levels of Col1α1 and collagen modifying genes including prolyl hydroxylases (PHs), lysyl oxidases (LOXs) and lysyl hydroxylases (LHs). Osteogenesis was assessed at the level of osteoblast specific gene expression and alizarin red staining for mineralization. Cell layer-associated matrix and collagen content were determined by amino acid analysis. At 4h, 100% cells were flattened on both surfaces, however the cells on smooth surface had a fibroblast-like shape, while cells on rough surface lacked any defined long axis. PH, LH, and most LOX mRNA levels were greater in hMSCs grown on rough surfaces for 3 days. The mineralized area was greater for rough surface at 28 and 42 days. The collagen content (percent total protein) was also greater at rough surface compared to smooth surface at 28 (36% versus 26%) and 42 days (46% versus 29%), respectively (p<.05). In a cell culture model, rough surface topography positively modulates collagen biosynthesis and accumulation and the expression of genes associated with collagen cross-linking in adherent hMSC. The altered biosynthesis of the collagen-rich ECM adjacent to endosseous implants may influence the biomechanical properties of osseointegrated endosseous implants.
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Affiliation(s)
- Daniela B S Mendonça
- Bone Biology and Implant Therapy Laboratory, Department of Prosthodontics, University of North Carolina at Chapel Hill, 330 Brauer Hall, CB #7450, Chapel Hill, NC 27599, USA.
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10
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Knippenberg M, Helder MN, Doulabi BZ, Bank RA, Wuisman PIJM, Klein-Nulend J. Differential effects of bone morphogenetic protein-2 and transforming growth factor-beta1 on gene expression of collagen-modifying enzymes in human adipose tissue-derived mesenchymal stem cells. Tissue Eng Part A 2009; 15:2213-25. [PMID: 19231972 DOI: 10.1089/ten.tea.2007.0184] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Adipose tissue-derived mesenchymal stem cells (AT-MSCs) in combination with bone morphogenetic protein-2 (BMP-2) or transforming growth factor-beta1 (TGF-beta1) are under evaluation for bone tissue engineering. Posttranslational modification of type I collagen is essential for functional bone tissue with adequate physical and mechanical properties. We investigated whether BMP-2 (10-100 ng/mL) and/or TGF-beta1 (1-10 ng/mL) affect gene expression of alpha2(I) procollagen and collagen-modifying enzymes, that is, lysyl oxidase and lysyl hydroxylases 1, 2, and 3 (encoded by PLOD1, 2, and 3), by human AT-MSCs. BMP-2, but not TGF-beta1, increased alkaline phosphatase activity after 28 days, indicating osteogenic differentiation of AT-MSCs. At day 4, both BMP-2 and TGF-beta1 upregulated alpha2(I) procollagen and PLOD1, which was downregulated at day 28. TGF-beta1, but not BMP-2, downregulated PLOD3 at day 28. Lysyl oxidase was upregulated by TGF-beta1 at day 4 and by BMP-2 at day 7. Neither BMP-2 nor TGF-beta1 affected PLOD2. In conclusion, these results suggest that AT-MSCs differentially respond to BMP-2 and TGF-beta1 with changes in gene expression of collagen-modifying enzymes. AT-MSCs may thus be able to appropriately modify type I collagen to form a functional bone extracellular matrix for tissue engineering, dependent on the growth factor added.
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Affiliation(s)
- Marlene Knippenberg
- Department of Oral Cell Biology, Academic Centre of Dentistry Amsterdam (ACTA), Universiteit van Amsterdam, and Research Institute MOVE, Vrije Universiteit , Amsterdam, The Netherlands
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11
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Kokkonen H, Cassinelli C, Verhoef R, Morra M, Schols HA, Tuukkanen J. Differentiation of Osteoblasts on Pectin-Coated Titanium. Biomacromolecules 2008; 9:2369-76. [DOI: 10.1021/bm800356b] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- H. Kokkonen
- Department of Anatomy and Cell Biology, University of Oulu, Post Office Box 5000, 90014 Oulu, Finland, Nobil Bio Ricerche, Str. S. Rocco 36, 14018 Villafranca d‘Asti, Italy, and Laboratory of Food Chemistry, Wageningen University, Bomenweg 2, 6703HD Wageningen, The Netherlands
| | - C. Cassinelli
- Department of Anatomy and Cell Biology, University of Oulu, Post Office Box 5000, 90014 Oulu, Finland, Nobil Bio Ricerche, Str. S. Rocco 36, 14018 Villafranca d‘Asti, Italy, and Laboratory of Food Chemistry, Wageningen University, Bomenweg 2, 6703HD Wageningen, The Netherlands
| | - R. Verhoef
- Department of Anatomy and Cell Biology, University of Oulu, Post Office Box 5000, 90014 Oulu, Finland, Nobil Bio Ricerche, Str. S. Rocco 36, 14018 Villafranca d‘Asti, Italy, and Laboratory of Food Chemistry, Wageningen University, Bomenweg 2, 6703HD Wageningen, The Netherlands
| | - M. Morra
- Department of Anatomy and Cell Biology, University of Oulu, Post Office Box 5000, 90014 Oulu, Finland, Nobil Bio Ricerche, Str. S. Rocco 36, 14018 Villafranca d‘Asti, Italy, and Laboratory of Food Chemistry, Wageningen University, Bomenweg 2, 6703HD Wageningen, The Netherlands
| | - H. A. Schols
- Department of Anatomy and Cell Biology, University of Oulu, Post Office Box 5000, 90014 Oulu, Finland, Nobil Bio Ricerche, Str. S. Rocco 36, 14018 Villafranca d‘Asti, Italy, and Laboratory of Food Chemistry, Wageningen University, Bomenweg 2, 6703HD Wageningen, The Netherlands
| | - J. Tuukkanen
- Department of Anatomy and Cell Biology, University of Oulu, Post Office Box 5000, 90014 Oulu, Finland, Nobil Bio Ricerche, Str. S. Rocco 36, 14018 Villafranca d‘Asti, Italy, and Laboratory of Food Chemistry, Wageningen University, Bomenweg 2, 6703HD Wageningen, The Netherlands
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12
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Pham QP, Kasper FK, Scott Baggett L, Raphael RM, Jansen JA, Mikos AG. The influence of an in vitro generated bone-like extracellular matrix on osteoblastic gene expression of marrow stromal cells. Biomaterials 2008; 29:2729-39. [PMID: 18367245 DOI: 10.1016/j.biomaterials.2008.02.025] [Citation(s) in RCA: 113] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2007] [Accepted: 02/28/2008] [Indexed: 01/15/2023]
Abstract
The function and development of cells rely heavily on the signaling interactions with the surrounding extracellular matrix (ECM). Therefore, a tissue engineering scaffold should mimic native ECM to recreate the in vivo environment. Previously, we have shown that an in vitro generated ECM secreted by cultured cells enhances the mineralized matrix deposition of marrow stromal cells (MSCs). In this study, MSC expression of 45 bone-related genes using real-time reverse transcriptase polymerase chain reaction (RT-PCR) was determined. Upregulation of osteoblastic markers such as collagen type I, matrix extracellular phosphoglycoprotein with ASARM motif, parathyroid hormone receptor, and osteocalcin, indicated that the MSCs on plain titanium scaffolds differentiated down the osteoblastic lineage and deposited a mineralized matrix on day 12. Significant mineralized matrix deposition was observed as early as day 4 on ECM-containing scaffolds and was associated with the enhancement in expression of a subset of osteoblast-specific genes that included a 2-fold increase in osteopontin expression at day 1 and a 6.5-fold increase in osteocalcin expression at day 4 as well as downregulation of chondrogenic gene markers. These results were attributed to the cellular interactions with growth factors and matrix molecules that are likely present in the in vitro generated ECM since the genes for insulin-like growth factor 1, insulin-like growth factor 2, vascular endothelial growth factor, dentin matrix protein, collagen type IV, cartilage oligomeric protein, and matrix metalloproteinase 13 were significantly upregulated during ECM construct generation. Overall, the data demonstrate that modulation of MSC differentiation occurs at the transcriptional level and gene expression of bone-related proteins is differentially regulated by the ECM. This study presents enormous implications for tissue engineering strategies, as it demonstrates that modification of a biomaterial with an in vitro generated ECM containing cell-generated bioactive signaling molecules can effectively direct gene expression and differentiation of seeded progenitor cell populations.
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Affiliation(s)
- Quynh P Pham
- Department of Bioengineering, Rice University, MS-142, P.O. Box 1892, Houston, TX 77251-1892, USA
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13
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Katafuchi M, Matsuura T, Atsawasuwan P, Sato H, Yamauchi M. Biochemical characterization of collagen in alveolar mucosa and attached gingiva of pig. Connect Tissue Res 2007; 48:85-92. [PMID: 17453910 DOI: 10.1080/03008200601143508] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Alveolar mucosa and attached gingiva are two continuous but functionally distinct connective tissues covering alveolar bone of the jaw. In this study, the major matrix component of these tissues, collagen, was biochemically characterized and compared. The tissues were obtained from mature pigs and analyzed for collagen content, amino acid composition, collagen types, collagen cross-linking, and gene expression. We found that alveolar mucosa is primarily composed of fibrillar collagens and the collagen content is higher than attached gingiva. The content of type III relative to type I collagen was higher in alveolar mucosa when compared with attached gingiva. The collagen cross-linking pattern also was distinct between the two tissues demonstrating that alveolar mucosa contained fewer reducible cross-links but more non-reducible cross-links in comparison to attached gingiva. The mRNA expression level of type I collagen in alveolar mucosa was significantly lower than that of attached gingiva. These results indicate that alveolar mucosa is a fibrillar collagen-rich tissue and, in comparison to gingival tissue, re-models slowly.
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Affiliation(s)
- Michitsuna Katafuchi
- Dental Research Center, University of North Carolina, Chapel Hill, North Carolina 27599, USA
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Goto Y, Matsuura T, Daigo Y, Sato H. Differential Gene Expression of Matrix Metalloproteinase-3 and -13 during Mineralization of MC3T3-E1 Cells Cultured on Titanium Implant Material. J HARD TISSUE BIOL 2005. [DOI: 10.2485/jhtb.14.20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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