Activation of Shh/Smo is sufficient to maintain oligodendrocyte precursor cells in an undifferentiated state and is not necessary for myelin formation and (re)myelination. - Nocera S; Marchena MA; Fernández-Gómez B; Gómez-Martín P; Sánchez-Jiménez E; Macías-Castellano A; Laó Y; Cordano C; Gómez-Torres Ó; Luján R; de Castro F (Glia, 2024)