Linked Life Data

19598119

Source:http://linkedlifedata.com/resource/pubmed/id/19598119

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
7
pubmed:dateCreated
2009-7-14
pubmed:abstractText
The epibranchial placodes are specialized areas of surface ectoderm that make a vital contribution to the peripheral nervous system, producing sensory neurons of the cranial ganglia. They have long been characterized as a series of patches of thickened ectoderm in the vicinity of each pharyngeal cleft. We have previously demonstrated that Sox3 is not only expressed in these structures but also marks a larger, earlier domain. Here we demonstrate that neurons are produced from the Sox3-positive ectoderm that lies outside of the classically-defined epibranchial placodes. Our data show that these regions contribute neurons to the cranial ganglia, but then cease producing neurons as they lose Sox3 expression. We further demonstrate that the ectoderm in these regions is responsive to extracellular or intracellular stimuli that initiate aspects of neuronal differentiation. This response to neurogenic stimuli is lacking in regions of ectoderm distant from the normal sites of neurogenesis and the response to constitutively active Bmp receptor in particular, disappears coincident with loss of Sox3 expression. Finally, we show that a dominant repressor form of Sox3 blocks the ability of the ectoderm to undergo neurogenesis. Thus, Sox3 appears to be essential for the neurogenic capacity of surface ectoderm exhibited by the epibranchial placodes.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
1696-3547
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
53
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1023-33
pubmed:meshHeading
pubmed:year
2009
pubmed:articleTitle
The surface ectoderm of the chick embryo exhibits dynamic variation in its response to neurogenic signals.
pubmed:affiliation
Childrens Brain Tumour Research Centre, Institute of Genetics, University of Nottingham, UK.
pubmed:publicationType
Journal Article