Cytochrome C Oxidase Activity in Newly Diagnosed Glioblastoma Multiforme (GBM)

This Biomarker trial is designed to prospectively evaluate the hypothesis that the overall survival (OS) time of a subject with newly diagnosed primary GBM tumors, treated by standard of care (SOC), is a function of the CcO enzymatic activity in the tumor (OS; time interval from date of first diagnosis to death from any cause, irrespective of post-SOC therapies, assessed up to 24 months from accrual). In particular, tumors with high CcO activity are associated with shorter OS time as compared to tumors with low CcO activity. SOC consists of post-surgical radiation therapy with concurrent Temozolomide followed by up to 12 cycles of adjuvant Temozolomide. Additional outcomes are to study the relation between CcO activity in the GBM tumors and progression free survival times (PFS; time intervals from dates of diagnosis to documented disease progression by MRI or tumor-related death) and, to compare the prognostic abilities of CcO activity to other frequently used biomarkers, namely the methylation status of O6-methylguanine-DNA methyltransferase (MGMT), on OS and PFS. Tumor tissue will be submitted by participating centers for measurements of the CcO/Citrate Synthase (CS), MGMT promoter methylation. The subjects will agree to receive the SOC treatment. The therapeutic option at the time of first recurrence is at the discretion of the treating physician. PFS and OS times will be compared with high vs. low CcO activity and with the MGMT methylation status of the tumor. At the time of death or at 24 months s/p enrollment (whichever comes first), the site PI will complete an exit form documenting the details of enrollees' treatment history and date(s) of any tumor progression.