Open AccessAn Oct4‐Sall4‐Nanog network controls developmental progression in the pre‐implantation mouse embryo
Author(s) -
Tan Meng How,
Au Kin Fai,
Leong Denise E,
Foygel Kira,
Wong Wing H,
Yao Mylene WM
Publication year - 2013
Publication title -
molecular systems biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 8.523
H-Index - 148
ISSN - 1744-4292
DOI - 10.1038/msb.2012.65
Subject(s) - biology , homeobox protein nanog , embryo , gene knockdown , embryonic stem cell , reprogramming , nanog homeobox protein , genetics , microbiology and biotechnology , gene regulatory network , transcriptome , gene , gene expression , induced pluripotent stem cell
Landmark events occur in a coordinated manner during pre‐implantation development of the mammalian embryo, yet the regulatory network that orchestrates these events remains largely unknown. Here, we present the first systematic investigation of the network in pre‐implantation mouse embryos using morpholino‐mediated gene knockdowns of key embryonic stem cell (ESC) factors followed by detailed transcriptome analysis of pooled embryos, single embryos, and individual blastomeres. We delineated the regulons of Oct4, Sall4, and Nanog and identified a set of metabolism‐ and transport‐related genes that were controlled by these transcription factors in embryos but not in ESCs. Strikingly, the knockdown embryos arrested at a range of developmental stages. We provided evidence that the DNA methyltransferase Dnmt3b has a role in determining the extent to which a knockdown embryo can develop. We further showed that the feed‐forward loop comprising Dnmt3b, the pluripotency factors, and the miR‐290‐295 cluster exemplifies a network motif that buffers embryos against gene expression noise. Our findings indicate that Oct4, Sall4, and Nanog form a robust and integrated network to govern mammalian pre‐implantation development.