中国组织工程研究 ›› 2013, Vol. 17 ›› Issue (1): 92-97.doi: 10.3969/j.issn.2095-4344.2013.01.015

• 干细胞与中医药 stem cells and traditional Chinese medicine • 上一篇    下一篇

骨碎补总黄酮依赖PI3K/Akt通路与牙髓干细胞的成骨分化

黄晓菲1,袁苏健1,杨 成2   

  1. 1 长江航运总医院口腔科,湖北省武汉市  430010
    2 华中科技大学同济医学院附属协和医院口腔科,湖北省武汉市  430022
  • 收稿日期:2012-03-21 修回日期:2012-05-16 出版日期:2013-01-01 发布日期:2013-01-01
  • 通讯作者: 杨成,博士,教授,主任医师,博士生导师,华中科技大学同济医学院附属协和医院口腔科,湖北省武汉市 430022 yangc715@126.com
  • 作者简介:黄晓菲★,女,1984年生,湖北省利川市人,汉族,2011年华中科技大学毕业,硕士,医师,主要从事口腔种植与生物材料的研究。huangxf84@yahoo.com.cn

Effects of drynaria total flavonoid on osteogenic differentiation of rat dental pulp stem cells via PI3K/Akt pathway

Huang Xiao-fei1, Yuan Su-jian1, Yang Cheng2   

  1. 1 Department of Stomatology, General Hospital of the Yangtze River Shipping, Wuhan  430010, Hubei Province, China
    2 Department of Stomatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan  430022, Hubei Province, China
  • Received:2012-03-21 Revised:2012-05-16 Online:2013-01-01 Published:2013-01-01
  • Contact: Yang Cheng, M.D., Professor, Chief physician, Doctoral supervisor, Department of Stomatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, Hubei Province, China yangc715@126.com
  • About author:Huang Xiao-fei★, Master, Physician, Department of Stomatology, General Hospital of the Yangtze River Shipping, Wuhan 430010, Hubei Province, China huangxf84@yahoo.com.cn

摘要:

背景:PI3K/Akt通路可能在骨碎补总黄酮促成骨分化作用中发挥重要调控作用。
目的:观察骨碎补总黄酮对大鼠牙髓干细胞成骨分化的影响,并对PI3K/Akt通路在其中的作用进行初步探讨。
方法:采用组织块消化法获得大鼠牙髓细胞,克隆化分离培养大鼠牙髓干细胞并进行鉴定。在培养体系中加入不同质量浓度(0.01,0.05,0.1 g/L)的骨碎补总黄酮,观察各组细胞的碱性磷酸酶水平及钙结节形成情况,并用Western Blot法检测各组细胞磷酸化Akt的表达变化。
结果与结论:分离得到的牙髓干细胞的细胞表面标志CD44和CD29呈阳性表达,而CD34表达呈阴性。骨碎补总黄酮组牙髓干细胞的碱性磷酸酶活性、钙结节形成能力和磷酸化Akt蛋白相对表达量增加,较空白对照组差异有显著性意义,且随骨碎补总黄酮质量浓度的增加而升高,表现出一定浓度和时间依赖性。说明骨碎补总黄酮对大鼠牙髓干细胞成骨分化具有促进作用,且该作用可能是依赖PI3K/Akt通路所介导的。

关键词: 干细胞, 干细胞与中医药, 牙髓干细胞, 骨碎补总黄酮, PI3K/Akt通路, 成骨分化, 干细胞图片文章

Abstract:

BACKGROUND: PI3K/Akt pathway may play an important regulative role in osteogenic differentiation of dental pulp stem cells induced by drynaria total flavonoid.  
OBJECTIVE: To explore the effects of total flavonoids of drynaria on osteogenic differentiation of rat dental pulp stem cells and investigate the role of PI3K/Akt pathway in the induced differentiation of rat dental pulp stem cells.
METHODS: Rat dental pulp stem cells were harvested by enzymatic digestion, cultured and identified by immunohistochemical staining. The dental pulp stem cells were cultured in media with different concentrations of drynaria total flavonoid (0.01 g/L, 0.05 g/L and 0.1 g/L). Alkaline phosphatase activities and formation of calcified tubercles in cells were determined in each group. Phosphorylated Akt expression in cells was detected by western blot method in each group.
RESULTS AND CONCLUSION: Dental pulp stem cells were positive for CD44 and CD29 expression, but they were negative for CD34. Compared to the blank control group, alkaline phosphatase activities, formation of calcified tubercles and phosphorylated Akt expression were significantly increased in the drynaria total flavonoid group in a dose- and time-dependent manner. These findings suggest that drynaria total flavonoid can promote the osteogenic differentiation of rat dental pulp stem cells, and this effect is likely mediated by PI3K/Akt pathway.

Key words: stem cells, stem cells and traditional Chinese medicine, dental pulp stem cells, drynaria total flavonoid, PI3K/Akt pathway, osteogenic differentiation, stem cell photographs-containing paper

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