NEFL and glioblastoma: The significant features of the neural subtype of GBM are the high levels of neuron marker gene expression, such as neurofilament light chain (NEFL), gamma-aminobutyric acid type A receptor subunit alpha 1 (GABRA1), synaptotagmin 1 (SYT1), and solute carrier family 12 member 5 (SLC12A5).