Dose-dependent nodal/smad signals pattern the early mouse embryo

Journal article

Nodal signals in the early post-implantation stage embryo are essential to establish initial proximal-distal (P-D) polarity and generate the final anterior-posterior (A-P) body axis. Nodal signaling in the epiblast results in the phosphorylation of Smad2 in the overlying visceral endoderm necessary to induce the AVE, in part via Smad2-dependent activation of the T-box gene Eomesodermin. Slightly later following mesoderm induction a continuum of dose-dependent Nodal signaling during the process of gastrulation underlies specification of mesodermal and definitive endoderm progenitors. Dynamic Nodal expression during the critical 72. h time window immediately following implantation, accomplished by a series of feed-back and feed-forward mechanisms serves to provide key positional cues required for establishment of the body plan and controls cell fate decisions in the early mammalian embryo. © 2014.

Authors: Robertson, E

• Publisher: Academic Press
• Journal: Seminars in Cell and Developmental Biology
• Volume: 32
• Pages: 73-79
• Publication date: 2014-01-01
• DOI: 10.1016/j.semcdb.2014.03.028
• EISSN: 1096-3634
• ISSN: 1084-9521
• Language: English
• Keywords: Smad2/3; TGFβ; Nodal; Gastrulation; Epiblast