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首页> 外文期刊>Genomics >Activation of genes for growth factor and cytokine pathways late in chondrogenic differentiation of ATDC5 cells.
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Activation of genes for growth factor and cytokine pathways late in chondrogenic differentiation of ATDC5 cells.

机译:ATDC5细胞软骨分化后期的生长因子和细胞因子途径的基因激活。

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The mouse embryonal carcinoma cell line ATDC5 provides an excellent model system for chondrogenesis in vitro. To understand better the molecular mechanisms of endochondral bone formation, we investigated gene expression profiles during the differentiation course of ATDC5 cells, using an in-house microarray harboring full-length-enriched cDNAs. For 28 days following chondrogenic induction, 507 genes were up- or down-regulated at least 1.5-fold. These genes were classified into five clusters based on their expression patterns. Genes for growth factor and cytokine pathways were significantly enriched in the cluster characterized by increases in expression during late stages of chondrocyte differentiation. mRNAs for decorin and osteoglycin, which have been shown to bind to transforming growth factors-beta and bone morphogenetic proteins, respectively, were found in this cluster and were detected in hypertrophic chondrocytes of developing mouse bones by in situ hybridization analysis. Taken together with assigned functions of individual genes in the cluster, interdigitated interaction between a number of intercellular signaling molecules is likely to take place in the late chondrogenic stage for autocrine and paracrine regulation among chondrocytes, as well as for chemoattraction and stimulation of progenitor cells of other lineages.
机译:小鼠胚胎癌细胞系ATDC5为体外软骨形成提供了出色的模型系统。为了更好地了解软骨内骨形成的分子机制,我们使用了带有全长富集cDNA的内部微阵列,研究了ATDC5细胞分化过程中的基因表达谱。软骨诱导后的28天中,507个基因被上调或下调了至少1.5倍。根据它们的表达模式将这些基因分为五个簇。生长因子和细胞因子途径的基因在簇中显着富集,其特征是在软骨细胞分化后期表达增加。在该簇中发现了decorin和osteoglycin的mRNA,它们分别与转化生长因子β和骨形态发生蛋白结合,并通过原位杂交分析在发育中的小鼠骨骼的肥大软骨细胞中检测到。结合簇中单个基因的指定功能,许多细胞间信号分子之间的相互交叉相互作用很可能在软骨形成后期发生,用于软骨细胞之间的自分泌和旁分泌调节,以及化学引诱和刺激软骨细胞的祖细胞。其他血统。

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