The microglial cells contained robust levels of cathepsinsB, D, and X, along with cathepsins A, K, L, and C. In the SH-SY5Yneuroblastoma cells, only two cathepsins, B and D, were detected;in the SKNMC neuroblastoma cells, cathepsins B and D were abundantand low levels of cathepsin C were detected. Here, CTSS is linked to neuroblastoma.