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2016 ; 32
(7
): 432-443
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Stepwise Progression of Embryonic Patterning
#MMPMID27230753
Sandler JE
; Stathopoulos A
Trends Genet
2016[Jul]; 32
(7
): 432-443
PMID27230753
show ga
It is long established that the graded distribution of Dorsal transcription
factor influences spatial domains of gene expression along the dorsoventral (DV)
axis of Drosophila melanogaster embryos. However, the more recent realization
that Dorsal levels also change with time raises the question of whether these
dynamics are instructive. An overview of DV axis patterning is provided, focusing
on new insights identified through quantitative analysis of temporal changes in
Dorsal target gene expression from one nuclear cycle to the next ('steps').
Possible roles for the stepwise progression of this patterning program are
discussed including (i) tight temporal regulation of signaling pathway
activation, (ii) control of gene expression cohorts, and (iii) ensuring the
irreversibility of the patterning and cell fate specification process.
|Animals
[MESH]
|Body Patterning/*genetics
[MESH]
|Drosophila melanogaster/*genetics/growth & development
[MESH]