The midbrain--hindbrain boundary organizer.
Cell fate in the cephalic neural primordium is controlled by an organizer located at the midbrain-hindbrain boundary. Studies in chick, mouse and zebrafish converge to show that mutually repressive interactions between homeodomain transcription factors of the Otx and Gbx class position this organizer in the neural primordium. Once positioned, independent signaling pathways converge in their activity to drive organizer function. Fibroblast growth factors secreted from the organizer are necessary for, and sufficient to mimic, organizer activity in patterning the midbrain and anterior hindbrain, and are tightly controlled by feedback inhibition.
Rhinn
M
M
Max Planck Institute for Molecular Cell Biology and Genetics, Pfotenhauer Strasse 108, 01307 Dresden, Germany.
Brand
M
M
D000818:Animals; D002642:Chick Embryo; D005346:Fibroblast Growth Factors / Q000502:physiology; D018398:Homeodomain Proteins / Q000235:genetics; D008636:Mesencephalon / Q000196:embryology*; D051379:Mice; D051857:Otx Transcription Factors; D012249:Rhombencephalon / Q000196:embryology*; D015027:Zebrafish; D029961:Zebrafish Proteins
C490147:Gbx1 protein, mouse; D018398:Homeodomain Proteins; D051857:Otx Transcription Factors; D029961:Zebrafish Proteins; C486024:gbx1 protein, zebrafish; D005346:Fibroblast Growth Factors