AKT1 and glioblastoma: We assessed the abundance of glioblastoma cancer stem cell (CSC) markersin immortalized U87 MG and U343 MG cell lines and patient-derived BR1.20 andBR3.20 cell cultures and measured the levels of proteins affecting the viralinfection efficiency in tumor cells – elements of the PI3K/Akt signalingpathway, and PAK1.