Migratory patterns and evolutionary plasticity of cranial neural crest cells in ray-finned fishes.

ABSTRACT: The cranial neural crest (CNC) arises within the developing central nervous system, but then migrates away from the neural tube in three consecutive streams termed mandibular, hyoid and branchial, respectively, according to the order along the anteroposterior axis. While the process of neural crest emigration generally follows a conserved anterior to posterior sequence across vertebrates, we find that ray-finned fishes (bichir, sterlet, gar, and pike) exhibit several heterochronies in the timing and order of CNC emergence that influences their subsequent migratory patterns. First, emigration of the cranial neural crest in these fishes occurs prematurely compared to other vertebrates, already initiating during early neurulation and well before neural tube closure. Second, delamination of th

SUBMITTER: Stundl J 

PROVIDER: S-EPMC7572781 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature