结合高通量生成和胚胎模型的高含量成像,将能够在(胚胎)毒性领域进行大规模筛选测定,药物开发,胚胎发生,和生殖医学。这项研究显示了连续培养和原位(即,在微孔中)基于3D干细胞的基于3D干细胞的模型的读出,该模型具有扩大的羊膜腔(PAC)(E3.5E5.5),即XEn/EPiCs。自动图像分析和监督机器学习允许识别胚胎形态发生,组织区室化,细胞分化,和连续分类。在不同时间窗口具有信号通路调节剂的屏幕提供关于它们对导致XEn/EPiC形成的发育过程的表型效应的时空信息。在两个时间窗口将微孔平台中的生物模型暴露于通路调节剂,即0-72小时和48-120小时,显示Wnt和Fgf/MAPK通路调节剂影响Epi分化及其极化,而BMP和Tgfβ/Nodal通路的调节影响XEn的规格和上皮化。Further,在PAC的形成和扩展的时机中确定了它们的集体作用。新开发的,可扩展的文化和分析平台,因此,为定量和系统地研究通路调节剂对早期胚胎发育的影响提供了独特的机会。
Combining high-throughput generation and high-content imaging of embryo models will enable large-scale screening assays in the fields of (embryo) toxicity, drug development, embryogenesis, and reproductive medicine. This
study shows the continuous culture and in situ (i.e., in microwell) imaging-based readout of a 3D stem cell-based model of peri-implantation epiblast (Epi)/extraembryonic endoderm (XEn) development with an expanded pro-amniotic cavity (PAC) (E3.5 E5.5), namely XEn/EPiCs. Automated image analysis and supervised machine learning permit the identification of embryonic
morphogenesis, tissue compartmentalization, cell differentiation, and consecutive classification. Screens with signaling pathway modulators at different time windows provide spatiotemporal information on their phenotypic effect on developmental processes leading to the formation of XEn/EPiCs. Exposure of the biological model in the microwell platform to pathway modulators at two time windows, namely 0-72 h and 48-120 h, show that Wnt and Fgf/MAPK pathway modulators affect Epi differentiation and its polarization, while modulation of BMP and Tgfβ/Nodal pathway affects XEn specification and epithelialization. Further, their collective role is identified in the timing of the formation and expansion of PAC. The newly developed, scalable culture and analysis platform, thereby, provides a unique opportunity to quantitatively and systematically
study effects of pathway modulators on early embryonic development.