Anti-Cancer Effects of Carvedilol With Standard Treatment in Glioblastoma and Response of Peripheral Glioma Circulating Tumor Cells

This is a pilot study to assess efficacy of the addition of a non-selective beta-blocker to standard of care treatment in the front-line setting of glioblastoma multiforme. And to also evaluate the level of peripheral glioma circulating tumor cells via TeleomeScan assay to correlate disease response determined by neuro-imaging. Peripheral blood samples will be collected at baseline, on day 1 of cycle 1 and then after on day 1 of cycle 4 and at the end of cycle 6 of adjuvant chemotherapy. in order to correlate the biological effects of treatment response. The investigators will evaluate the quantity of peripheral glioma circulating tumor cells and want to apply the information seen in the periphery to the status of the cancer on imaging studies. Subjects will start oral carvedilol at 6.25 mg orally twice daily and will evaluate the patient and vital status if they tolerate this dose at 1-2 weeks after initiation. If tolerated well, will increase the dose to the maximum anticipation of 12.5 mg orally twice daily. Treatment will proceed for 6 cycles and carvedilol will stop at the end of 6 cycles. Patients will be monitored with neuroimaging prior before chemoradiotherapy, before adjuvant temozolomide and every 2 months on adjuvant temozolomide. Following the completion of 6 cycles of adjuvant therapy, patients will continue to receive neuroimaging on every 3 months' basis until disease progression based upon standard of care.