... as a morphogen during zebrafish gastrulation. However, technical limitations have so far prevented direct visualization of the endogenous Fgf8a gradient and confirmation of its morphogenic activity. Here, we monitor Fgf8a propagation in the developing neural plate using a CRISPR/Cas9-mediated EGFP knock...

... inducers Snail1 and Zeb2 plays a fundamental role in defining embryonic territories in the mouse, as E-cadherin needs to be downregulated in the primitive streak and in the epiblast, concomitant with the formation of mesendodermal precursors and the neural plate, respectively. Here, we show...

... and that maintain the coherence of cell populations undergoing specific morphogenetic processes. In this study, we show that the activity of the Eph/Ephrin signalling pathway maintains segregation between the prospective eyes and adjacent regions of the anterior neural plate during the early stages of forebrain...

...Luisa Sanchez-Arrones; Claudio D. Stern; Paola Bovolenta; Luis Puelles The anterior border of the neural plate, presumed to contain the prospective peripheral portion (roof) of the prospective telencephalon, emerges within a vaguely defined proneural ectodermal region. Fate maps carried out at HH4...

... cells to study cell fate choice and cell behaviour at late gastrulation. In addition, we provide a comprehensive spatiotemporal atlas of anterior gene expression at stages crucial for anterior ectoderm regionalisation and neural plate formation. Our results show that, at late gastrulation stage...

... forebrain because fibroblast growth factor 8 ( Fgf8 ), which is expressed in the forebrain rostral signalling centre, is activated 2 hours earlier in cavefish embryos than in their surface fish counterparts, in response to stronger Shh signalling in cavefish. We also show that neural plate patterning...

...′LCU, thereby forming a negative autoregulatory loop. The combination of positive regulation and negative autoregulation constitutes a fine-tuning system for post-transcriptional control. In early embryogenesis, Mex3b is involved in anteroposterior patterning of the neural plate. Consistent...

... expression in cultured explants of anterior neural plate from which the ANR is removed( Shimamura and Rubenstein,1997 ). Moreover, ectopically expressing Fgf8 in the early posterior telencephalon can result in a mirror-image duplication of parts of the dorsal telencephalon( Fukuchi-Shimogori and Grove,2001...

... at the anterior margin of the neural plate of the Xenopus laevis embryo. Now, we demonstrate that Ras-dva and its homologs in other species constitute a novel protein family, distinct from the previously known families of small GTPases. We show that the expression of Ras-dva begins during gastrulation throughout...

... the neural plate and the epidermis, at intermediate levels of BMP signaling. We recently described a novel secreted protein, Tsukushi ( TSK ),which works as a BMP antagonist during chick gastrulation. Here, we report on the Xenopus TSK gene ( X-TSK ), and show that it is involved in neural crest...

... and negative functions, dictates cell fate and behavior. Using an antisense approach to knockdown gene function in vivo, we find that each of the three Gli proteins is required for the induction of all primary neurons in the amphibian neural plate and regulates the bHLH/Notch neurogenic cascade. Analyses...

...Muriel Rhinn; Klaus Lun; Marta Luz; Michaela Werner; Michael Brand The organizing center located at the midbrain-hindbrain boundary (MHB)patterns the midbrain and hindbrain primordia of the neural plate. Studies in several vertebrates showed that the interface between cells expressing Otx and Gbx...

...Natalia Martynova; Fedor Eroshkin; Galina Ermakova; Andrey Bayramov; Jessica Gray; Robert Grainger; Andrey Zaraisky During early development of the nervous system in vertebrates, expression of the homeobox gene Anf/Hesx1/Rpx is restricted to the anterior neural plate subdomain corresponding...

...Pedro Fernández-Garre; Lucia Rodríguez-Gallardo; Victoria Gallego-Díaz; Ignacio S. Alvarez; Luis Puelles A detailed fate map was obtained for the early chick neural plate (stages 3d/4). Numerous overlapping plug grafts were performed upon New-cultured chick embryos, using fixable...

...Patricia Ybot-Gonzalez; Patricia Cogram; Dianne Gerrelli; Andrew J. Copp Neural tube closure is a fundamental embryonic event whose molecular regulation is poorly understood. As mouse neurulation progresses along the spinal axis, there is a shift from midline neural plate bending to dorsolateral...

...Yukinori Endo; Noriko Osumi; Yoshio Wakamatsu Neural crest is induced at the junction of epidermal ectoderm and neural plate by the mutual interaction of these tissues. In previous studies, BMP4 has been shown to pattern the ectodermal tissues, and BMP4 can induce neural crest cells from the neural...

... in mammalian embryos prior to the formation of Rathke’s pouch (RP), we labeled the rostral end of the neural plate and the adjacent area focally with DiI at the open neurula stage (9.5 dpc). After a 48-hours culture of the whole embryos, strongly labeled cells were detected in the RP only when DiI was applied...

..., the establishment of this Shh activity gradient could be achieved through the graded distribution of the Shh protein itself, or could depend on additional cell surface or secreted proteins that modify the response of neural cells to Shh. Cells of the neural plate differentiate from a region of the ectoderm that has...

..., the precise role and timing of Shh signaling relevant to the specification of ventral telencephalic identity remains unclear. By analysing neural cell differentiation in chick neural plate explants we provide evidence that neural cells acquire molecular properties characteristic of the ventral telencephalon...

... DV patterning at all AP levels of the neural plate. Thus, we show that Bmp activity is required for specification of cell fates around the margin of the entire neural plate, including forebrain regions that do not form neural crest. Surprisingly, we find that Bmp activity is also required...