To investigate the protein degradation machinery in vivo, we investigated normal appearing brain (NAB) tissue, glioblastoma infiltration zone and tumor tissue from astrocytoma patients and evaluated the protein expression of the key autophago-lysosomal factors LC3B, p62, Beclin1, BAG3, LAMP2 and CTSB. This evidence concerns the gene CTSB and astrocytoma (excluding glioblastoma).