Coculture of dental pulp stem cells with endothelial cells enhances osteo-/odontogenic and angiogenic potential in vitro
Language: 
English
Abstract: 

INTRODUCTION: Dental pulp stem cells (DPSCs) have received much attention as a promising population of stem cells in regenerative endodontics. Securing a good blood supply during regeneration is a challenging task because of the constricted apical canal opening, which allows only a limited blood supply. The aim of this study was to investigate any potential synergistic effects of dental pulp stem cells and endothelial cells (ECs) on osteo-/odontogenic and angiogenic differentiation in vitro. METHODS: Different ratios of DPSCs and ECs were cultured in direct contact using optimized medium for coculture. The 70% confluent cocultures were incubated in the osteo-/odontogenic differentiation medium for up to 3 weeks. Alkaline phosphatase (ALP) activity, the expression levels of ALP, bone sialoprotein (BSP), dentin sialophosphoprotein (DSPP) genes, and alizarin red staining for mineralization at different time points were analyzed. The tubular network formation on Matrigel and the gene expression levels of CD117, VEGF, CD34, and Flk-1 were used as assays to analyze angiogenesis. RESULTS: The quantification of ALP in DPSC:EC cocultures revealed a greater ALP activity compared with DPSC-alone cultures. At all the time points, 1:1 cultures showed a significantly greater ALP activity than that of DPSC-alone cultures. Alizarin red staining and quantification revealed a much greater amount of calcification in the 1:1 and 1:5 cocultures compared with other cultures (P < .01). The expression levels of ALP, BSP, and DSPP genes further confirmed the greater osteo-/odontogenic differentiation in cocultures compared with those of DPSC-alone cultures. Matrigel assay showed that the addition of DPSCs stabilized preexisting vessel-like structures formed by ECs and increased the longevity of them. CONCLUSIONS: Direct coculture of DPSCs and ECs enhances the in vitro differentiation toward osteo-/odontogenic and angiogenic phenotypes.

Author(s): 
Dissanayaka, Waruna Lakmal
Zhan, Xuan
Zhang, Chengfei
Hargreaves, Kenneth M.
Jin, Lijian
Tong, Edith H. Y.
Item Type: 
Journal Article
Publication Title: 
Journal of Endodontics
Journal Abbreviation: 
J Endod
Publication Date: 
2012-04
Publication Year: 
2012
Pages: 
454-463
Volume: 
38
Issue: 
4
ISSN: 
1878-3554
DOI: 
10.1016/j.joen.2011.12.024
Library Catalog: 
NCBI Published Medical (?)
Extra: 
PMID: 22414829

Turabian/Chicago Citation

Waruna Lakmal Dissanayaka, Xuan Zhan, Chengfei Zhang, Kenneth M. Hargreaves, Lijian Jin and Edith H. Y. Tong. 2012-04. "Coculture of dental pulp stem cells with endothelial cells enhances osteo-/odontogenic and angiogenic potential in vitro." Journal of Endodontics 38: 4: 454-463. 10.1016/j.joen.2011.12.024.

Wikipedia Citation

<ref> {{Cite journal | doi = 10.1016/j.joen.2011.12.024 | issn = 1878-3554 | volume = 38 | pages = 454-463 | last = Dissanayaka | first = Waruna Lakmal | coauthors = Zhan, Xuan, Zhang, Chengfei, Hargreaves, Kenneth M., Jin, Lijian, Tong, Edith H. Y. | title = Coculture of dental pulp stem cells with endothelial cells enhances osteo-/odontogenic and angiogenic potential in vitro | journal = Journal of Endodontics | date = 2012-04 | pmid = | pmc = }} </ref>