Embryonic timing, axial stem cells, chromatin dynamics, and the Hox clock

Collinear regulation of Hox genes in space and time has been an outstanding question ever since the initial work of Ed Lewis in 1978. Here we discuss recent advances in our understanding of this phenomenon in relation to novel concepts associated with large-scale regulation and chromatin structure during the development of both axial and limb patterns. We further discuss how this sequential transcriptional activation marks embryonic stemcell-like axial progenitors in mammals and, consequently, how a temporal genetic system is further translated into spatial coordinates via the fate of these progenitors. In this context, we argue the benefit and necessity of implementing this unique mechanism as well as the difficulty in evolving an alternative strategy to deliver this critical positional information.


Published in:
Genes & Development, 31, 14, 1406-1416
Year:
2017
Publisher:
Cold Spring Harbor, Cold Spring Harbor Laboratory Press
ISSN:
0890-9369
Keywords:
Laboratories:




 Record created 2017-10-09, last modified 2018-03-17


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