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Σάββατο 15 Ιουλίου 2017

Cells isolated from cryopreserved dental follicle display similar characteristics to cryopreserved dental follicle cells

Publication date: Available online 14 July 2017
Source:Cryobiology
Author(s): Hefeng Yang, Jie Li, JingJing Sun, Weihua Guo, Hui Li, Jinglong Chen, Yu Hu, Weidong Tian, Song Li
Dental follicle tissue is a promising resource of mesenchymal stem cells for cytotherapeutic approaches and tissue engineering applications. There are two procedures for banking of human dental follicle stem cells have been reported. Conventional method requires cell isolation, expansion and immediate cryopreservation. Whereas dental follicle stem cells can be isolated from cryopreserved dental follicle fragments. The aim of this study was to compare the characteristics of dental follicle cells isolated from cryopreserved fragments (DFCs-CF) with dental follicle cells recovered from cryopreserved cells (DFCs-CC). Dental follicle fragments obtained after mechanical disaggregation were divided into two parts, with one part maintained in culture, while another part underwent cryopreservation. Dental follicle fragments and dental follicle cells from fresh tissue were stored in liquid nitrogen for 3 months. After thawing, the isolation, morphology, proliferation, cell cycle, colony-forming-unit ability, stemness-related marker expression, apoptosis, and multi-lineage differentiation potential of DFCs-CF were tested compared with DFCs-CC. DFCs-CF expressed mesenchymal stem cells marker, proliferated well, showed similar levels of mRNA for stemness- and apoptosis-related genes and exhibited the capacity of multi-lineage differentiation similar to those of DFCs-CC. These results imply that cryopreservation of dental follicle fragments is an effective banking method for isolation of dental follicle cells.



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