(Centro Nacional de Investigaciones Oncológicas (CNIO)) Glioblastoma is a brain tumour with very poor prognosis. Patients with glioblastoma usually develop resistance to treatments. Combination therapy could be an effective approach.The study carried out at CNIO provides unexpected and valuable information on cancer biology. It revealed that components in the RAS pathway, which is involved in numerous types of cancer, also participates in telomere maintenance. The study will be published in EMBO Molecular Medicine this week.