GUSB and frontotemporal dementia: qPCR validated the increases in PSAP, HEXA, GUSB, CD63, and LAMP1 for patients with FTD-GRN and sporadic FTLD-TDP type A, and in GRN for patients with sporadic FTLD-TDP type A (Tukey’s post-hoc test for GRN in Ctrl vs. GRN, p = 0.078).