Ruxolitinib With Radiation and Temozolomide for Grade III Gliomas and Glioblastoma

Primary Objective Arm 1: To determine Maximum tolerated dose (MTD) of ruxolitinib with radiation (2 Gy x 30) in patients with unmethylated MGMT high-grade glioma (HGG) Arm 2: To determine Maximum tolerated dose (MTD) of ruxolitinib with radiation (2 Gy x 30) and daily temozolomide at 75 mg/m2 in patients with methylated MGMT high-grade glioma (HGG) Secondary Objective(s) Arm 1: * Safety of combination of ruxolitinib with radiation * Progression free survival (PFS) * Overall survival (OS) Arm 2: * Safety of combination of ruxolitinib with radiation and temozolomide * Progression free survival (PFS) * Overall survival (OS) STUDY DESIGN A phase 1 design will be used with cohorts of 3 patients treated at each dose level in both arms 1 and 2 and monitored for treatment-related toxicities. Escalation to the next dose will proceed in the absence of dose-limiting toxicities (DLTs).