YAP1 regulates the self-organized fate patterning of hESC-derived gastruloids


The gastrulation process relies on complex interactions between developmental signaling pathways that are not completely understood. Here, we interrogated the contribution of the Hippo signaling effector YAP1 to the formation of the three germ layers by analyzing human embryonic stem cell (hESC)-derived 2D-micropatterned gastruloids. YAP1 knockout gastruloids display a reduced ectoderm layer and enlarged mesoderm and endoderm layers compared with wild type. Furthermore, our epigenome and transcriptome analysis revealed that YAP1 attenuates Nodal signaling by directly repressing the chromatin accessibility and transcription of key genes in the Nodal pathway, including the NODAL and FOXH1 genes. Hence, in the absence of YAP1, hyperactive Nodal signaling retains SMAD2/3 in the nuclei, impeding ectoderm differentiation of hESCs. Thus, our work revealed that YAP1 is a master regulator of Nodal signaling, essential for instructing germ layer fate patterning in human gastruloids. Copyright © 2021 The Authors. Published by Elsevier Inc. All rights reserved.

Authors Stronati E, Giraldez S, Huang L, Abraham E, McGuire GR, Hsu HT, Jones KA, Estarás C
Journal Stem cell reports
Publication Date 2022 Feb 8;17(2):211-220
PubMed 35063126
PubMed Central PMC8828531
DOI 10.1016/j.stemcr.2021.12.012

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