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Central role of gene cooption in neural crest evolution

โœ Scribed by Daniel Meulemans; Marianne Bronner-Fraser

Publisher
John Wiley and Sons
Year
2005
Tongue
English
Weight
335 KB
Volume
304B
Category
Article
ISSN
1552-5007

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โœฆ Synopsis

A bona fide neural crest is a defining feature of vertebrate embryos. Protochordate gene expression patterns indicate that neural crest evolution coincided with the cooption of several transcriptional regulators to the neural plate border of the vertebrate ancestor. Recent cell labeling experiments in ascidians suggest that cells in this domain may have been migratory and thus displayed some neural crest cell-like behavior. Taken together, these data suggest that the recruitment of new genetic pathways conferred novel developmental potentials upon the migratory neural tube cells of the prevertebrate chordate.

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## Abstract Neural crest cells are a vertebrate innovation and form a wide variety of embryonic cell types as diverse as peripheral neurons and facial skeleton. They undergo complex migration and differentiation processes from their site of origin in the developing central nervous system to their f