|  Help  |  About  |  Contact Us

Publication : The role of Foxg1 and dorsal midline signaling in the generation of Cajal-Retzius subtypes.

First Author  Hanashima C Year  2007
Journal  J Neurosci Volume  27
Issue  41 Pages  11103-11
PubMed ID  17928452 Mgi Jnum  J:125693
Mgi Id  MGI:3759694 Doi  10.1523/JNEUROSCI.1066-07.2007
Citation  Hanashima C, et al. (2007) The role of Foxg1 and dorsal midline signaling in the generation of Cajal-Retzius subtypes. J Neurosci 27(41):11103-11
abstractText  Cajal-Retzius (CR) cells, the earliest-born neurons in the neocortex, arise from discrete sources within the telencephalon, including the dorsal midline and the pallial-subpallial boundary (PSB). In particular, the cortical hem, a region of high bone morphogenetic proteins (BMPs) and Wnt (wingless-type MMTV integration site family) expression but lacking in Foxg1 (forkhead box G1) is a major source of CR neurons. Whether CR cells from distinct origins arise from disparate developmental processes or share a common mechanism is unclear. To elucidate the molecular basis of CR cell development, we assessed the role of both Foxg1 and dorsal midline signaling in the production of cortical hem- and PSB-derived CR cells. We demonstrate that the loss of Foxg1 results in the overproduction of both of these CR populations. However, removal of Foxg1 at embryonic day 13, although expanding the number of CR cells with a PSB phenotype, does not result in an expansion of BMPs or Wnts in the dorsomedial signaling center. Conversely, loss of the dorsal midline ligands as observed in Gli3 (glioma-associated oncogene homolog 3) mutants results in the loss of the cortical hem-derived CR character but does not affect the specification of PSB-derived CR cells. Hence, our findings demonstrate that, although the specification of cortical hem-derived CR cells is dependent on signaling from the dorsal midline, Foxg1 functions to repress the generation of both cortical hem- and PSB-derived CR cells.
Quick Links:
 
Quick Links:
 

Expression

Publication --> Expression annotations

 

Other

26 Bio Entities

Trail: Publication

0 Expression