《口腔颌面外科杂志》 ›› 2012, Vol. 22 ›› Issue (5): 342-345. doi: 10.3969/j.issn.1005-4979.2012.05.008

• 基础研究 • 上一篇    下一篇

钟状期小鼠磨牙牙胚组织中蛋白聚糖类型的检测分析

蒋备战1,柴田俊一2,王佐林3   

  1. 1.同济大学口腔医学院牙体牙髓病学教研室,上海 200072;2.北海道医疗大学齿学部口腔组织学讲座,日本 北海道061-0293;3.同济大学口腔医学院口腔颌面外科教研室,上海 200072
  • 出版日期:2012-10-28 发布日期:2013-01-02
  • 通讯作者: 王佐林,教授. E-mail: kouqiang399@hotmail.com
  • 作者简介:蒋备战(1970—),男,湖南人,副主任医师,博士. E-mail: jiangbeizhan@tongji.edu.cn
  • 基金资助:

    上海市科学技术委员会医学引导项目(114119a3400)

Proteoglycans in the Bell Stage of Odontogenesis in Mouse Molars: An in vitro Study

JIANG Bei-zhan1, Shunichi Shibata2 , WANG Zuo-lin3   

  1. 1.Department of Endodontics and Operative Dentistry, School of Stomatology, Tongji University, Shanghai 200072, China;  2.Department of Histology, School of Dentistry, Health Science University of Hokkaido, Hokkaido, 061-0293, Japan; 3. Department of Oral & Maxillofacial Surgery, School of Stomatology, Tongji University, Shanghai 200072, China
  • Online:2012-10-28 Published:2013-01-02

摘要: 目的:检测分析钟状期小鼠磨牙牙胚组织中蛋白聚糖的类型。方法:建立钟状期小鼠磨牙牙胚体外培养模型,用核素标记,凝胶层析,碱处理及酶消化的方法分析体外培的养牙胚组织中蛋白聚糖的类型。结果: 体外培养的小鼠钟状期磨牙牙胚、成釉器与牙乳头中[35S]标记的大分子经Superose 6层析柱层析后,均得到3个洗脱峰。其中第1个洗脱峰经硫酸软骨素酶ABC消化后完全消失,第2、第3个洗脱峰在硫酸软骨素酶ABC消化后峰值降低,继续用乙酰肝素酶消化后则基本消失。只用硫酸角质素酶处理,上述3个洗脱峰均未发生改变。碱处理后3个洗脱峰均消失,并在有效分配系数Kd=0.47处出现1个新的洗脱峰。结论:小鼠钟状期磨牙牙胚、成釉器与牙乳头组织含有大分子硫酸软骨素蛋白聚糖、小分子硫酸软骨素蛋白聚糖以及硫酸乙酰肝素类蛋白聚糖,但不存在硫酸角质素蛋白聚糖。

关键词: 牙胚, 蛋白聚糖, 凝胶层析, 小鼠

Abstract: Objective: To investigate the expression and synthesis of  proteoglycans in the bell stage of odontogenesis in cultured mouse molars. Methods: Mouse molar tooth germs were obtained from 30 pregnant ICR mouse and to establish culture model in vitro  by  Trowell culture system  at early bell stage. Enamel organs and dental papilla were separated. and  metabolically labeled with [35S]Na2SO4 as precursors. The culture suspension was analyzed by gel chromatography,  enzymatic digestion, and alkaline treatment. Results: Three eluted peaks were obtained in all samples. A major peak eluted at Vo (Vo peak) which was completely susceptible to digestion with chondroitinase ABC. The other two were susceptible to digestion with chondroitinase ABC and Heparitinase respectively. After alkaline borohydride reaction, the eluted three peaks disappeared and a large peak was observed at effective distribution coefficient Kd=0.47.  However, all [35S]-labeled samples were not susceptible to digestion with keratanase. Conclusion: At the bell stage of odontogenesis, a macromolecule chondroitin sulfate proteoglycan, micromolecule  chondroitin sulfate proteoglycans, and  heparan sulphate proteoglycans were identified. No kerantin sulfate was detected.

Key words:  tooth germ, proteoglycans, gel filtration;mouse

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