Perivascular/mural cells originate from either the mesoderm or the cranial neural crest. Regardless of their origin, Notch signalling is necessary for their formation. Furthermore, in both chicken and mouse, constitutive Notch1 activation (via expression of the Notch1 intracellular domain) is sufficient in vivo to convert trunk mesoderm-derived somite cells to perivascular cells, at the expense...

NEUROSCIENCE Correction for “Fibroblast growth factor signaling instructs ensheathing glia wrapping of Drosophila olfactory glomeruli,” by Bing Wu, Jiefu Li, Ya-Hui Chou, David Luginbuhl, and Liqun Luo, which was first published July 3, 2017; 10.1073/pnas.1706533114 (Proc Natl Acad Sci USA 114:7505–7512). The authors note that an additional affiliation should be listed for Bing Wu. The new affi...

with OECs. These are the cells that ensheath the axons within the olfactory nerve and constitute the major glial component of the superficially located nerve fiber layer of the olfactory bulb. This property of the OEC to provide a permissive boundary between the PNS and CNS is The OEC, originally described by the Spanish histologist Blanes Viale at the end of the nineteenth century, shares prop...