ASCL1 and Stroke: In vivo, however, human Muse cells took ∼3 days to express early neural markers (Mash1 and NeuroD) and ∼7 days to express maturity markers (MAP2 and NeuN) in the post-infarct tissue of rat stroke model (Uchida et al., 2015b; Uchida et al., 2017a).