Chinese Journal of Tissue Engineering Research ›› 2013, Vol. 17 ›› Issue (10): 1821-1826.doi: 10.3969/j.issn.2095-4344.2013.10.018

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Role of cytokines in osteoblast differentiation of periodontal ligament stem cells

Song Jing1, He Jian-min1, Li Shan2, Yan Xue-ping2, Lu Huan2   

  1. 1 Gansu People’s Hospital, Lanzhou 730000, Gansu Province, China
    2 School of Stomatology, Lanzhou University, Lanzhou 730000, Gansu Province, China
  • Received:2012-07-14 Revised:2012-09-05 Online:2013-03-05 Published:2013-03-05
  • Contact: He Jian-min, Master, Professor, Gansu People’s Hospital, Lanzhou 730000, Gansu Province, China hejm@lzu.edu.cn
  • About author:Song Jing★, Studying for master’s degree, Gansu People’s Hospital, Lanzhou 730000, Gansu Province, China 329134778@qq.com

Abstract:

BACKGROUND: Periodontal ligament stem cells are the adult stem cells in periodontal tissues, which possess the ability for strong proliferation, self-renewal and multipotent differentiation. These cells can promote the osteoblast differentiation of periodontal ligament stem cells and therefore assist in treatment of periodontal diseases.
OBJECTIVE: To investigate the effects of insulin-like growth factor-1 and fibroblast growth factor-2 on osteoblast differentiation of periodontal ligament stem cells.
METHODS: Human periodontal ligament stem cells were harvested from periodontal ligament tissue by collagenase digestion. After in vitro identification, amplification and hematoxylin-eosin staining, periodontal ligament stem cells were biologically detected by flow cytometry. Then these cells were induced with osteogenic induction medium, insulin-like growth factor-1 or fibroblast growth factor-2 for 7 and 14 days. Alkaline phosphatase staining, alkaline phosphatase activity detection and alizarin red staining were performed. In addition, real-time quantitative PCR method was performed to detect the expression of marker gene of osteogenic differentiation.
RESULTS AND CONCLUSION: Compared to the control group, alkaline phosphatase activity and calcified nodules were significantly greater, and Runx2, Alp, and col-1 mRNA expression was significantly higher, in the insulin-like growth factor-1 group. These findings suggest that insulin-like growth factor-1 and fibroblast growth factor-2, to different extents, promote osteogenic differentiation of periodontal ligament stem cells cultured in vitro.

Key words: stem cells, stem cell culture and differentiation, insulin-like growth factor-1, fibroblast growth factor-2, periodontal ligament stem cells, osteoblasts, osteogenic differentiation, cartilage, bone growth, multipotent differentiation, calcified nodules, stem cell photographs-containing paper

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