Journal
GENES & DEVELOPMENT
Volume 18, Issue 22, Pages 2822-2834Publisher
COLD SPRING HARBOR LAB PRESS, PUBLICATIONS DEPT
DOI: 10.1101/gad.322904
Keywords
neuronal migration; axon guidance; neuropilin; VEGF; semaphorins
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Funding
- MRC [G120/727] Funding Source: UKRI
- Medical Research Council [G120/727] Funding Source: researchfish
- Medical Research Council [G120/727, G120/727(60800)] Funding Source: Medline
- NIMH NIH HHS [MH59199, R01 MH059199] Funding Source: Medline
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Developing neurons accurately position their somata within the neural tube to make contact with appropriate neighbors and project axons to their preferred targets. Taking advantage of a collection of genetically engineered mouse mutants, we now demonstrate that the behavior of somata and axons of the facial nerve is regulated independently by two secreted ligands for the transmembrane receptor neuropilin 1 (Nrp1), the semaphorin Sema3A and the VEGF164 isoform of Vascular Endothelial Growth Factor. Although Sema3A is known to control the guidance of facial nerve axons, we now show that it is not required for the pathfinding of their somata. Vice versa, we find that VEGF164 is not required for axon guidance of facial motor neurons, but is essential for the correct migration of their somata. These observations demonstrate, for the first time, that VEGF contributes to neuronal patterning in vivo, and that different compartments of one cell can be co-ordinately patterned by structurally distinct ligands for a shared receptor.
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