PPARD and glioblastoma: GBM neurospheres with high expression of FABP7 were treated for 48 h with three different small molecule PPARs antagonists: FH535 that antagonizes both PPARγ and PPARδ activity, GW9662 which is a selective PPARγ antagonist, and GSK0660 a PPARδ antagonist (all 15 μM).