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首页> 外文期刊>Cell and Tissue Research >Localization of Notch signaling molecules and their effect on cellular proliferation in adult rat pituitary.
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Localization of Notch signaling molecules and their effect on cellular proliferation in adult rat pituitary.

机译:Notch信号分子的定位及其对成年大鼠垂体细胞增殖的影响。

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摘要

Notch signaling is a cell-to-cell signaling system involved in the maintenance of precursor cells in many tissues. Although Notch signaling has been reported in the pituitary gland, the histological characteristics of Notch receptors and ligands in the gland are unknown. Here, we report the histological gene expression pattern of Notch receptors and ligands and the role of Notch signaling in cellular proliferation in adult rat pituitary gland. In situ hybridization detected transcripts of Notch1 and 2 and Jagged1 and 2. Double-staining with a combination of in situ hybridization and immunohistochemistry revealed that their mRNAs were localized in almost half of the S100-protein-positive cells, which are generally regarded as marginal layer cells and folliculo-stellate cells. In primary culture of anterior pituitary cells, proliferation of S100-protein-positive cells was modulated by Notch signaling inhibitor and solubilized Notch ligand. Furthermore, quantitative analysis revealed that the inhibition of Notch signaling led to the down-regulation of mRNA for the Notch target gene Hes1 and the up-regulation of p57 gene expression. These findings suggest that Notch signaling is involved in the proliferation of S100-protein-positive cells, presumably precursor cells, in adult rat pituitary gland.
机译:Notch信号传导是一种细胞间信号传导系统,涉及许多组织中前体细胞的维持。尽管在垂体腺中已报道了Notch信号传导,但尚不清楚腺中Notch受体和配体的组织学特征。在这里,我们报告Notch受体和配体的组织学基因表达模式以及Notch信号在成年大鼠垂体细胞增殖中的作用。原位杂交检测到Notch1和2以及Jagged1和2的转录本。双重染色与原位杂交和免疫组织化学相结合显示,它们的mRNA几乎位于一半的S100蛋白阳性细胞中,通常被认为是边缘细胞层细胞和卵泡星状细胞。在垂体前叶细胞的原代培养中,Notch信号抑制剂和可溶性Notch配体可调节S100蛋白阳性细胞的增殖。此外,定量分析显示,Notch信号的抑制导致Notch靶基因Hes1的mRNA下调和p57基因表达的上调。这些发现表明,Notch信号传导与成年大鼠垂体中S100蛋白阳性细胞(可能是前体细胞)的增殖有关。

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