Int J Mol Sci:转基因小鼠胚胎干细胞中Hes1和Msx1的激活增加成神经嵴衍生物的表达

2019-01-13 MedSci MedSci原创

神经嵴(NC)包括多能细胞群,其产生外周神经元,软骨和平滑肌细胞,以及其他表型。当在经历NC分化的小鼠胚胎干细胞(mESC)中表达时,Hes1和Msx1的作用尚未可知。在这项工作中,我们生成稳定的mESCs转染编码嵌合蛋白的构建体,其中糖皮质激素受体(GR)的配体结合域,通过加入地塞米松转移到细胞核,与Hes1(HGR)或Msx1(MGR)融合,以及双转基因细胞(HGR + MGR)。这些品系继续

神经嵴(NC)包括多能细胞群,其产生外周神经元,软骨和平滑肌细胞,以及其他表型。当在经历NC分化的小鼠胚胎干细胞(mESC)中表达时,Hes1和Msx1的作用尚未可知。

在这项工作中,我们生成稳定的mESCs转染编码嵌合蛋白的构建体,其中糖皮质激素受体(GR)的配体结合域,通过加入地塞米松转移到细胞核,与Hes1(HGR)或Msx1(MGR)融合,以及双转基因细胞(HGR + MGR)。这些品系继续表达多能性标志物。在NC分化时,所有品系显示出明显的Sox2表达降低和Sox9,Snai1和Msx1的表达上调,表明NC定型。加入地塞米松以诱导嵌合蛋白的核转位。我们发现胶原IIa转录物在MGR细胞中增加,而HGR + MGR的共激活导致平滑肌肌动蛋白(α-Sma)转录物的显著增加。免疫染色显示HGR + MGR细胞中的活化诱导了更高比例的β-TUBULIN III +,α-SMA +和COL2A1 +细胞。

总之,这些发现表明单独或与HES-1组合的MSX-1的核转位产生软骨细胞样细胞,并且同时激活HES-1和MSX-1增加平滑肌和神经元细胞的产生。

原始出处:

Karla Méndez-Maldonado,Guillermo Vega-López, et al.,  Activation of Hes1 and Msx1 in Transgenic Mouse Embryonic Stem Cells Increases Differentiation into Neural Crest Derivatives. Int J Mol Sci. 2018 Dec; 19(12): 4025.

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