NFYA and neuroblastoma: NF-YAx expression, detected in 20% (3/15) NF-YA-positive NB RNA samples, was the exclusive high-level NF-YA mRNA isoform expressed in a stage 3 NB but was not detected in stage 1 and 4 NBs, human neonatal neural stem cells, HEK-293 human neural-lineage embryonic kidney cells and 14 human NB cell lines.