Journal
DEVELOPMENT
Volume 142, Issue 7, Pages 1293-1298Publisher
COMPANY OF BIOLOGISTS LTD
DOI: 10.1242/dev.122390
Keywords
Retinoic acid; Forebrain roof plate; Invagination; Choroid plexus; Chick
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Funding
- Department of Science and Technology (DST), Government of India [SR/SO/AS-71/2006]
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The developing forebrain roof plate (RP) contains a transient signaling center, perturbations in which have been linked to holoprosencephaly (HPE). Here, we describe a novel domain of retinoic acid (RA) signaling that is specific to the chick RP and demonstrate that RA signaling is sufficient for inducing characteristics of the RP in ectopic locations. We further demonstrate that, unlike what has been observed in the mouse, RA signaling is essential for invagination of the RP in chick, failure of which leads to an HPE-like phenotype. In addition, we found that RA exerts a negative influence on choroid plexus differentiation. Thus, our findings identify RA as a novel regulator of chick forebrain RP development.
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