RELN and glioblastoma: Taken together, our results indicate that: (a) the expression of reelin protein is remarkably higher in GBM tissue and PCSCs; (b) the expression of reelin transcript is higher in PCSCs rather than GCSCs, while the Dab1 mRNA level is more heterogeneous, being highly expressed in three out of four PCSCs samples; and (c) administration of reelin to U87MG induces migration as well as spheroid-like structure formation in vitro.