Ketamine exposure in early development impairs specification of the primary germ cell layers.

Ketamine exposure in early development impairs specification of the primary germ cell layers.
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DOI:
10.1016/j.ntt.2014.04.001
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发表时间:
2014-05
影响因子:
2.9
通讯作者:
Eggan K
Eggan K
中科院分区:
医学3区
文献类型:
--
作者:
Akeju O;Davis-Dusenbery BN;Cassel SH;Ichida JK;Eggan K

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临床前和临床证据表明n -甲基- d -天冬氨酸受体(NMDAr)信号传导参与早期胚胎发育。然而,NMDAr信号在早期发育中的作用尚未得到很好的研究。在这里,我们使用小鼠胚胎干细胞模型来逐步探索NMDAr信号对早期细胞命运规范的影响。我们发现,NMDAr的拮抗作用会损害神经外胚层和中胚层细胞系的分化,而对胚胎外胚层细胞系的分化几乎没有影响。与这些发现一致,外源性NMDA促进神经外胚层分化。最后,NMDAr拮抗剂改变了TGF-β超家族信号的几个关键靶点的表达,为这些发现提供了一种机制。总之,本研究表明,NMDAr拮抗剂干扰胚胎发生的正常发育途径,并且在神经外胚层和中胚层细胞命运规范之前,这种干扰最为明显。
Preclinical and clinical evidence implicates N-methyl-D-aspartate receptor (NMDAr) signaling in early embryological development. However, the role of NMDAr signaling in early development has not been well studied. Here, we use a mouse embryonic stem cell model to perform a step-wise exploration of the effects of NMDAr signaling on early cell fate specification. We found that antagonism of the NMDAr impaired specification into the neuroectodermal and mesoendodermal cell lineages, with little or no effect on specification of the extraembryonic endoderm cell lineage. Consistent with these findings, exogenous NMDA promoted neuroectodermal differentiation. Finally, NMDAr antagonism modified expression of several key targets of TGF-β superfamily signaling, suggesting a mechanism for these findings. In summary, this study shows that NMDAr antagonism interferes with the normal developmental pathways of embryogenesis, and suggests that interference is most pronounced prior to neuroectodermal and mesoendodermal cell fate specification.
TGF-β在干细胞生物学中发挥的和声。
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