LGALS1 and glioblastoma: To verify the expression of Gal-1 in different GSC and to establish a baseline expression of Gal-1, we tested the expression of Gal-1 in short-term cultures of patient-derived xenograft (PDX) GSCs obtained from GBM patient specimens (GSC268, GSC6-27, GSC20, GSC28, GSC33, GSC262), neural progenitor cells (NPC) and astrocytes.