scholarly journals Induction and migration of the anterior visceral endoderm is regulated by the extra-embryonic ectoderm

Development ◽  
2005 ◽  
Vol 132 (11) ◽  
pp. 2513-2520 ◽  
Author(s):  
T. A. Rodriguez

2021 ◽  
Author(s):  
Shifaan Thowfeequ ◽  
Jonathan Fiorentino ◽  
Di Hu ◽  
Maria Solovey ◽  
Sharon Ruane ◽  
...  

During early post-implantation development of the mouse embryo, the Anterior Visceral Endoderm (AVE) differs from surrounding visceral endoderm (VE) in its migratory behaviour and ability to restrict primitive streak formation to the opposite side of the egg cylinder. In order to characterise the molecular basis for the unique properties of the AVE, we combined single-cell RNA-sequencing of the VE prior to and during AVE migration, with high-resolution imaging, short-term lineage labelling, phosphoproteomics and pharmacological intervention. This revealed the transient nature of the AVE, the emergence of heterogeneities in AVE transcriptional states relative to position of cells, and its prominence in establishing gene expression asymmetries within the spatial constraints of the embryo. We identified a previously unknown requirement of Ephrin- and Semaphorin-signalling for AVE migration. These findings point to a tight coupling of transcriptional state and position in the AVE and reveal molecular heterogeneities underpinning its migratory behaviour and function.







2006 ◽  
Vol 123 (4) ◽  
pp. 288-296 ◽  
Author(s):  
Lucy Richardson ◽  
Maria-Elena Torres-Padilla ◽  
Magdalena Zernicka-Goetz


Development ◽  
1978 ◽  
Vol 45 (1) ◽  
pp. 93-105
Author(s):  
Brigid Hogan ◽  
Rita Tilly

This paper describes the in vitro development of inner cell masses isolated immunosurgically from mouse blastocysts which had been collected on 3·5 days p.c. and then incubated for 24 h. The inner cell masses continue to grow in culture and develop through a series of stages with increasing complexity of internal organization. By day 1 all of the cultured ICMs have an outer layer of endoderm, and by day 3 some of them have two distinct kinds of inside cells; a columnar epithelial layer and a thin hemisphere of elongated cells. Later, mesodermal cells appear to delaminate from a limited region of the columnar layer, close to where it forms a junction with the thinner cells. By day 5, about 25% of the cultured ICMs have a striking resemblance to normal 7·5-day p.c. C3H embryos, with embryonic ectoderm, extra-embryonic ectoderm and chorion, embryonic and extra-embryonic mesoderm, and visceral endoderm. When mechanically disrupted and grown as attached clumps of cells in a tissue dish, these embryo-like structures give rise to trophoblast-like giant cells. These results suggest that the inner cell mass of 4·5-day p.c. blastocysts contains cells which can give rise to trophoblast derivates in culture.



Development ◽  
1978 ◽  
Vol 43 (1) ◽  
pp. 289-313
Author(s):  
M. Dziadek ◽  
E. Adamson

The localization and synthesis of alphafoetoprotein (AFP) during mouse embryogenesis were studied by immunoperoxidase and by immunoprecipitation after radioactive labelling, using an antiserum prepared against AFP. AFP is first detectable in embryos on the 7th day of gestation (7th day embryos). In 7th and 8th day embryos AFP is confined to visceral (proximal) endoderm cells around the embryonic region of the egg cylinder. Visceral extra-embryonic and parietal (distal) endoderm cells do not contain AFP. By the 9th day of gestation AFP is also present in the extra-embryonic ectoderm, mesoderm and embryonic ectoderm cells around the three cavities of the embryo. These tissues do not synthesize AFP when cultured in isolation, but can adsorb AFP when it is added to the medium. On the 12th day of gestation AFP synthesis is confined to the endoderm layer of the visceral yolk sac. It is concluded that the ability to synthesize AFP is a property which is restricted to the visceral endoderm during early post-implantation development. The presence of AFP in other tissues of the embryo appears to be due to adsorption.



2019 ◽  
Vol 450 (2) ◽  
pp. 132-140 ◽  
Author(s):  
Francesco Antonica ◽  
Lorenzo Carlo Orietti ◽  
Richard Lester Mort ◽  
Magdalena Zernicka-Goetz


PLoS ONE ◽  
2011 ◽  
Vol 6 (3) ◽  
pp. e17620 ◽  
Author(s):  
Daniel W. Stuckey ◽  
Aida Di Gregorio ◽  
Melanie Clements ◽  
Tristan A. Rodriguez


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