Reconstruction of Alveolar Bone Defects Using Bone Morphogenetic Protein 2 Mediated Rabbit Dental Pulp Stem Cells Seeded on Nano-Hydroxyapatite/Collagen/Poly(L-lactide)

The objective of the present study was to evaluate the capacity of a tissue-engineered bone complex of recombinant human bone morphogenetic protein 2 (rhBMP-2) - mediated dental pulp stem cells (DPSCs) and nano-hydroxyapatite/collagen/poly(L-lactide) (nHAC/PLA) to reconstruct critical-size alveolar...

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Veröffentlicht in:Tissue engineering. Part A 2011-10, Vol.17 (19-20), p.2417-2433
Hauptverfasser: Liu, Hong-Chen, E, Ling-Ling, Wang, Dong-Sheng, Su, Fang, Wu, Xia, Shi, Zhan-Ping, Lv, Yan, Wang, Jia-Zhu
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container_end_page 2433
container_issue 19-20
container_start_page 2417
container_title Tissue engineering. Part A
container_volume 17
creator Liu, Hong-Chen
E, Ling-Ling
Wang, Dong-Sheng
Su, Fang
Wu, Xia
Shi, Zhan-Ping
Lv, Yan
Wang, Jia-Zhu
description The objective of the present study was to evaluate the capacity of a tissue-engineered bone complex of recombinant human bone morphogenetic protein 2 (rhBMP-2) - mediated dental pulp stem cells (DPSCs) and nano-hydroxyapatite/collagen/poly(L-lactide) (nHAC/PLA) to reconstruct critical-size alveolar bone defects in New Zealand rabbit. Autologous DPSCs were isolated from rabbit dental pulp tissue and expanded ex vivo to enrich DPSCs numbers, and then their attachment and differentiation capability were evaluated when cultured on the culture plate or nHAC/PLA. The alveolar bone defects were treated with nHAC/PLA, nHAC/PLA+rhBMP-2, nHAC/PLA+DPSCs, nHAC/PLA+DPSCs+rhBMP-2, and autogenous bone (AB) obtained from iliac bone or were left untreated as a control. X-ray and a polychrome sequential fluorescent labeling were performed postoperatively and the animals were sacrificed 12 weeks after operation for histological observation and histomorphometric analysis. Our results showed that DPSCs expressed STRO-1 and vementin, and favored osteogenesis and adipogenesis in conditioned media. DPSCs attached and spread well, and retained their osteogenic phenotypes on nHAC/PLA. The rhBMP-2 could significantly increase protein content, alkaline phosphatase activity/protein, osteocalcin content, and mineral formation of DPSCs cultured on nHAC/PLA. The X-ray graph, the fluorescent, histological observation, and histomorphometric analysis showed that the nHAC/PLA+DPSCs+rhBMP-2 tissue-engineered bone complex had an earlier mineralization and more bone formation inside the scaffold than nHAC/PLA, nHAC/PLA+rhBMP-2, and nHAC/PLA+DPSCs, or even autologous bone. Implanted DPSCs' contribution to new bone was detected through transfected eGFP genes. Our findings indicated that stem cells existed in adult rabbit dental pulp tissue. The rhBMP-2 promoted osteogenic capability of DPSCs as a potential cell source for periodontal bone regeneration. The nHAC/PLA could serve as a good scaffold for autologous DPSC seeding, proliferation, and differentiation. The tissue-engineered bone complex with nHAC/PLA, rhBMP-2, and autologous DPSCs might be a better alternative to autologous bone for the clinical reconstruction of periodontal bone defects.
doi_str_mv 10.1089/ten.tea.2010.0620
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Autologous DPSCs were isolated from rabbit dental pulp tissue and expanded ex vivo to enrich DPSCs numbers, and then their attachment and differentiation capability were evaluated when cultured on the culture plate or nHAC/PLA. The alveolar bone defects were treated with nHAC/PLA, nHAC/PLA+rhBMP-2, nHAC/PLA+DPSCs, nHAC/PLA+DPSCs+rhBMP-2, and autogenous bone (AB) obtained from iliac bone or were left untreated as a control. X-ray and a polychrome sequential fluorescent labeling were performed postoperatively and the animals were sacrificed 12 weeks after operation for histological observation and histomorphometric analysis. Our results showed that DPSCs expressed STRO-1 and vementin, and favored osteogenesis and adipogenesis in conditioned media. DPSCs attached and spread well, and retained their osteogenic phenotypes on nHAC/PLA. The rhBMP-2 could significantly increase protein content, alkaline phosphatase activity/protein, osteocalcin content, and mineral formation of DPSCs cultured on nHAC/PLA. The X-ray graph, the fluorescent, histological observation, and histomorphometric analysis showed that the nHAC/PLA+DPSCs+rhBMP-2 tissue-engineered bone complex had an earlier mineralization and more bone formation inside the scaffold than nHAC/PLA, nHAC/PLA+rhBMP-2, and nHAC/PLA+DPSCs, or even autologous bone. Implanted DPSCs' contribution to new bone was detected through transfected eGFP genes. Our findings indicated that stem cells existed in adult rabbit dental pulp tissue. The rhBMP-2 promoted osteogenic capability of DPSCs as a potential cell source for periodontal bone regeneration. The nHAC/PLA could serve as a good scaffold for autologous DPSC seeding, proliferation, and differentiation. The tissue-engineered bone complex with nHAC/PLA, rhBMP-2, and autologous DPSCs might be a better alternative to autologous bone for the clinical reconstruction of periodontal bone defects.</description><identifier>ISSN: 1937-3341</identifier><identifier>EISSN: 1937-335X</identifier><identifier>DOI: 10.1089/ten.tea.2010.0620</identifier><identifier>PMID: 21563858</identifier><language>eng</language><publisher>United States: Mary Ann Liebert, Inc</publisher><subject>Adipogenesis - drug effects ; Alkaline Phosphatase - metabolism ; Alveolar Process - drug effects ; Alveolar Process - pathology ; Alveolar Process - surgery ; Animals ; Bone Morphogenetic Protein 2 - pharmacology ; Bone morphogenetic proteins ; Bones ; Cell Separation ; Cells, Cultured ; Collagen - pharmacology ; Colony-Forming Units Assay ; Dental pulp ; Dental Pulp - cytology ; Dental Pulp - drug effects ; Dental Pulp - ultrastructure ; Durapatite - chemistry ; Female ; Gene Expression Regulation - drug effects ; Genotype &amp; phenotype ; Green Fluorescent Proteins - genetics ; Green Fluorescent Proteins - metabolism ; Humans ; Morphology ; Nanoparticles - chemistry ; Original Articles ; Osteocalcin - metabolism ; Osteogenesis - drug effects ; Physiological aspects ; Polyesters - pharmacology ; Prosthesis Implantation ; Proteins ; Rabbits ; Recombinant Proteins - pharmacology ; Reconstructive Surgical Procedures - methods ; Stem Cell Transplantation ; Stem cells ; Stem Cells - cytology ; Stem Cells - drug effects ; Stem Cells - ultrastructure ; Tissue engineering ; Transforming Growth Factor beta - pharmacology</subject><ispartof>Tissue engineering. 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Part A</title><addtitle>Tissue Eng Part A</addtitle><description>The objective of the present study was to evaluate the capacity of a tissue-engineered bone complex of recombinant human bone morphogenetic protein 2 (rhBMP-2) - mediated dental pulp stem cells (DPSCs) and nano-hydroxyapatite/collagen/poly(L-lactide) (nHAC/PLA) to reconstruct critical-size alveolar bone defects in New Zealand rabbit. Autologous DPSCs were isolated from rabbit dental pulp tissue and expanded ex vivo to enrich DPSCs numbers, and then their attachment and differentiation capability were evaluated when cultured on the culture plate or nHAC/PLA. The alveolar bone defects were treated with nHAC/PLA, nHAC/PLA+rhBMP-2, nHAC/PLA+DPSCs, nHAC/PLA+DPSCs+rhBMP-2, and autogenous bone (AB) obtained from iliac bone or were left untreated as a control. 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E, Ling-Ling ; Wang, Dong-Sheng ; Su, Fang ; Wu, Xia ; Shi, Zhan-Ping ; Lv, Yan ; Wang, Jia-Zhu</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c588t-71cb6fce8e85b2dcc97a5988eba2f7d46009c17ebfd9ef875dc6bdba63bec6a23</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>Adipogenesis - drug effects</topic><topic>Alkaline Phosphatase - metabolism</topic><topic>Alveolar Process - drug effects</topic><topic>Alveolar Process - pathology</topic><topic>Alveolar Process - surgery</topic><topic>Animals</topic><topic>Bone Morphogenetic Protein 2 - pharmacology</topic><topic>Bone morphogenetic proteins</topic><topic>Bones</topic><topic>Cell Separation</topic><topic>Cells, Cultured</topic><topic>Collagen - pharmacology</topic><topic>Colony-Forming Units Assay</topic><topic>Dental pulp</topic><topic>Dental Pulp - cytology</topic><topic>Dental Pulp - drug effects</topic><topic>Dental Pulp - ultrastructure</topic><topic>Durapatite - chemistry</topic><topic>Female</topic><topic>Gene Expression Regulation - drug effects</topic><topic>Genotype &amp; 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Part A</jtitle><addtitle>Tissue Eng Part A</addtitle><date>2011-10-01</date><risdate>2011</risdate><volume>17</volume><issue>19-20</issue><spage>2417</spage><epage>2433</epage><pages>2417-2433</pages><issn>1937-3341</issn><eissn>1937-335X</eissn><abstract>The objective of the present study was to evaluate the capacity of a tissue-engineered bone complex of recombinant human bone morphogenetic protein 2 (rhBMP-2) - mediated dental pulp stem cells (DPSCs) and nano-hydroxyapatite/collagen/poly(L-lactide) (nHAC/PLA) to reconstruct critical-size alveolar bone defects in New Zealand rabbit. Autologous DPSCs were isolated from rabbit dental pulp tissue and expanded ex vivo to enrich DPSCs numbers, and then their attachment and differentiation capability were evaluated when cultured on the culture plate or nHAC/PLA. The alveolar bone defects were treated with nHAC/PLA, nHAC/PLA+rhBMP-2, nHAC/PLA+DPSCs, nHAC/PLA+DPSCs+rhBMP-2, and autogenous bone (AB) obtained from iliac bone or were left untreated as a control. X-ray and a polychrome sequential fluorescent labeling were performed postoperatively and the animals were sacrificed 12 weeks after operation for histological observation and histomorphometric analysis. Our results showed that DPSCs expressed STRO-1 and vementin, and favored osteogenesis and adipogenesis in conditioned media. DPSCs attached and spread well, and retained their osteogenic phenotypes on nHAC/PLA. The rhBMP-2 could significantly increase protein content, alkaline phosphatase activity/protein, osteocalcin content, and mineral formation of DPSCs cultured on nHAC/PLA. The X-ray graph, the fluorescent, histological observation, and histomorphometric analysis showed that the nHAC/PLA+DPSCs+rhBMP-2 tissue-engineered bone complex had an earlier mineralization and more bone formation inside the scaffold than nHAC/PLA, nHAC/PLA+rhBMP-2, and nHAC/PLA+DPSCs, or even autologous bone. Implanted DPSCs' contribution to new bone was detected through transfected eGFP genes. Our findings indicated that stem cells existed in adult rabbit dental pulp tissue. The rhBMP-2 promoted osteogenic capability of DPSCs as a potential cell source for periodontal bone regeneration. The nHAC/PLA could serve as a good scaffold for autologous DPSC seeding, proliferation, and differentiation. The tissue-engineered bone complex with nHAC/PLA, rhBMP-2, and autologous DPSCs might be a better alternative to autologous bone for the clinical reconstruction of periodontal bone defects.</abstract><cop>United States</cop><pub>Mary Ann Liebert, Inc</pub><pmid>21563858</pmid><doi>10.1089/ten.tea.2010.0620</doi><tpages>17</tpages></addata></record>
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identifier ISSN: 1937-3341
ispartof Tissue engineering. Part A, 2011-10, Vol.17 (19-20), p.2417-2433
issn 1937-3341
1937-335X
language eng
recordid cdi_proquest_miscellaneous_904477644
source MEDLINE; Alma/SFX Local Collection
subjects Adipogenesis - drug effects
Alkaline Phosphatase - metabolism
Alveolar Process - drug effects
Alveolar Process - pathology
Alveolar Process - surgery
Animals
Bone Morphogenetic Protein 2 - pharmacology
Bone morphogenetic proteins
Bones
Cell Separation
Cells, Cultured
Collagen - pharmacology
Colony-Forming Units Assay
Dental pulp
Dental Pulp - cytology
Dental Pulp - drug effects
Dental Pulp - ultrastructure
Durapatite - chemistry
Female
Gene Expression Regulation - drug effects
Genotype & phenotype
Green Fluorescent Proteins - genetics
Green Fluorescent Proteins - metabolism
Humans
Morphology
Nanoparticles - chemistry
Original Articles
Osteocalcin - metabolism
Osteogenesis - drug effects
Physiological aspects
Polyesters - pharmacology
Prosthesis Implantation
Proteins
Rabbits
Recombinant Proteins - pharmacology
Reconstructive Surgical Procedures - methods
Stem Cell Transplantation
Stem cells
Stem Cells - cytology
Stem Cells - drug effects
Stem Cells - ultrastructure
Tissue engineering
Transforming Growth Factor beta - pharmacology
title Reconstruction of Alveolar Bone Defects Using Bone Morphogenetic Protein 2 Mediated Rabbit Dental Pulp Stem Cells Seeded on Nano-Hydroxyapatite/Collagen/Poly(L-lactide)
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