[Osteogenic gene expression of human periodontal ligament stem cells during osteogenic induction]
Jing-lei Zhao1, Ling-yong Jiang, Li-xia Mao
1Department of Oral and Cranomaxillofacial Science, Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine; Shanghai Key Laboratory of Stomatology. Shanghai 200011, China.E-mail:zhaojingleiff@gmail.com.
Urpose:
To isolate and identify the human periodontal ligament stem cells, evaluate osteogenetic capacity, and investigate the changes of osteogenic bone related gene expression in mineralized medium at different times.
Methods:
PDLSCs were isolated by tissue culture and magnetic activated cell sorting. Immunofluorescence staining was used for identification. The general situation of osteogenesis was assessed with alkaline phosphatase (ALP) and alizarin red staining. Real-time PCR was used to detect the expression of genes in osteoinduction. SPSS12.0 software package was used for data analysis.
Results:
Tissue culture with magnetic cell sorting could isolate high-purity human periodontal ligament stem cells. During the osteogenic process, the expression of FoxO1 and Runx2 firstly increased and then decreased, ALP and OCN gene levels continued to increase.
Conclusions:
Similar to osteogenesis, ALP, Runx2, FoxO1 and OCN are regularly expressed during osteogenic induction.
