In this regard, our observation that the Bone Morphogenic Protein antagonist, Nbl1 (neuroblastoma, suppression of tumorigenicity 1) shows highly elevated expression in adult Bergmann glia compared to P6 is interesting, since this gene has been shown previously to repress maintenance of the precursor state and promote neuronal differentiation through its action on BMP7 [81]. Here, BMP7 is linked to neuroblastoma.