Olfactory ensheathing cells are neural-crest-derived (Barraud et al., 2010) cells that ensheath axons of the olfactory sensory neurons but do not form myelin. Molecularly, they showed a peculiar combination of markers otherwise archetypical of oligodendrocytes (Plp1, Sox10), pericytes (Vtn), endothelial cells (Cldn5), neurons (Npy), and astrocytes (Aldoc), as shown in Figure S3B.
