La formation des trois feuillets embryonnaires primordiaux et leur régionalisation selon les
axes embryonnaires sont des étapes cruciales au cours du développement précoce. Dans …

Extracellular regulation of growth factor signaling is a key event for embryonic patterning.
Heparan sulfate proteoglycans (HSPG) are among the molecules that regulate this signaling …

Chemokines play a crucial role in developmental processes and recent studies have
revealed that they also control gastrulation movements. In this paper, we report the …

As experiências efectuadas no inicio do século passado por Spemann e Mangold
demonstraram que o lábio dorsal do blastoporo de embriões de anfíbio consegue induzir as …

Patterning of the marginal zone in the Xenopus embryo has been attributed to interactions
between dorsal genes expressed in the organizer and ventral-specific genes. In this …

The formation of embryonic axes is a complex inductive process mediated by several
maternal and zygotic signals like Wnt, TGFb, BMP or FGF signaling. Antero-posterior and …

L'axe animal-vegetatif de l'embryon d'oursin est defini avant la fecondation et les differents
territoires embryonnaires sont etablis le long de cet axe par des mecanismes qui sont …

The Wnt pathway regulates the early dorsal–ventral axis in Xenopus through a complex of β-
catenin and HMG box transcription factors of the Lef/Tcf family. We show that the promoter of …

Degree: M. Sc. DegreeYear: 2004 Institute: Memorial University of Newfoundland (Canada)
A novel Xenopus gene called Xrel3 has been recently described, which encodes a member …

Formation of the left–right axis involves a symmetry-breaking signal originating in the node
or its equivalents, which increases TGF-β signaling on the left side of the embryo and …