生长因子及MAPK途径对生长板软骨细胞增殖和分化的影响
发布时间:2018-08-23 12:59
【摘要】:第一章 大鼠肋生长板软骨细胞的分离、培养及生物学特性的研究 目的:建立大鼠肋生长板软骨细胞的体外培养模型,探讨其在体外培养条件下的生物学特性。 方法:显微解剖分离出大鼠肋生长板,酶消化法(0.05%透明质酸酶和0.2%Ⅱ型胶原酶)获得分散的大鼠肋生长板软骨细胞(rat costochondral growth plate chondrocyte,RGC),常规接种,单层培养。对原代~第5代RGC进行生长动力学分析,并通过免疫细胞化学、阿尔新兰染色和Western blot检测原代~第5代RGC中Ⅱ型胶原、α-SMA和蛋白多糖的分布和表达。 结果:原代培养的生长板软骨细胞中95%以上的细胞Ⅱ型胶原阳性染色,细胞核周围和细胞膜周边都有Ⅱ型胶原的阳性染色,阳性染色的纤维包裹着细胞核,保持圆形的细胞强阳性染色。随着传代次数的增加,表达Ⅱ型胶原的细胞比例和表达量下降,第6代RGC中仅保持圆形的细胞仍呈阳性染色。原代培养的RGC表达大量的蛋白多糖,阿尔新兰阳性染色。第2,3代阿尔新兰染色减少,3代后阿尔新兰染色皆呈阴性。原代RGC中,α-SMA的表达很弱,随传代次数增加,α-SMA的表达量逐渐增高;Ⅱ型胶原的表达刚好和α-SMA相反,原代RGC表达最强,随着传代次数的增加,表达逐渐下降。 结论:成功建立大鼠肋生长板软骨细胞的体外培养模型。单层培养的RGC在第4代后逐渐失去分化表型,α-SMA可以作为RGC去分化的一个新的标志物。
[Abstract]:Chapter 1 isolation, culture and biological characteristics of rat costal growth plate chondrocytes objective: to establish an in vitro culture model of rat costal growth plate chondrocytes. Objective: to study the biological characteristics of its in vitro culture. Methods: the rat costal growth plates were isolated by microdissection. The scattered (rat costochondral growth plate chondrocyte chondrocytes were obtained by enzyme digestion (0.05% hyaluronidase and 0.2% collagenase). The growth kinetics of primary to fifth generation RGC was analyzed. The distribution and expression of type 鈪,
本文编号:2199152
[Abstract]:Chapter 1 isolation, culture and biological characteristics of rat costal growth plate chondrocytes objective: to establish an in vitro culture model of rat costal growth plate chondrocytes. Objective: to study the biological characteristics of its in vitro culture. Methods: the rat costal growth plates were isolated by microdissection. The scattered (rat costochondral growth plate chondrocyte chondrocytes were obtained by enzyme digestion (0.05% hyaluronidase and 0.2% collagenase). The growth kinetics of primary to fifth generation RGC was analyzed. The distribution and expression of type 鈪,
本文编号:2199152
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