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体外下颌髁突成骨分化过程中的基因表达

Gene expression during osteogenic differentiation in mandibular condyles in vitro.

作者信息

Strauss P G, Closs E I, Schmidt J, Erfle V

机构信息

GSF-Abteilung für Molekulare Zellpathologie, Neuherberg, Federal Republic of Germany.

出版信息

J Cell Biol. 1990 Apr;110(4):1369-78. doi: 10.1083/jcb.110.4.1369.

Abstract

The cartilagenous tissue of mandibular condyles of newborn mice contains progenitor cells as well as young and mature chondrogenic cells. During in vitro cultivation of the tissue, progenitor cells undergo osteogenic differentiation and form new bone (Silbermann, M., D. Lewinson, H. Gonen, M. A. Lizarbe, and K. von der Mark. 1983. Anat. Rec. 206:373-383). We have studied the expression of genes that typify osteogenic differentiation in mandibular condyles during in vitro cultivation. RNAs of the genes for collagen type I, osteonectin, alkaline phosphatase, and bone gla protein were sequentially expressed in progenitor cells and hypertrophic chondrocytes during culture. Osteopontin expression peaked in both the early and the late phase of the differentiation process. The data indicate a distinct sequence of expression of osteoblast-specific genes during osteogenic differentiation and new bone formation in mandibular condyles.

摘要

新生小鼠下颌髁突的软骨组织含有祖细胞以及年轻和成熟的软骨生成细胞。在该组织的体外培养过程中,祖细胞经历成骨分化并形成新骨(西尔伯曼,M.,D. 莱温森,H. 戈嫩,M. A. 利扎尔贝,和 K. 冯·德·马克。1983年。《解剖学记录》206:373 - 383)。我们研究了体外培养过程中下颌髁突中成骨分化典型基因的表达情况。在培养过程中,I型胶原、骨连接蛋白、碱性磷酸酶和骨钙蛋白基因的RNA在祖细胞和肥大软骨细胞中依次表达。骨桥蛋白的表达在分化过程的早期和晚期均达到峰值。数据表明,在下颌髁突的成骨分化和新骨形成过程中,成骨细胞特异性基因存在明显的表达顺序。

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