Title
A Phase III Trial of Lomustine-Temozolomide Combination Therapy Versus Standard Temozolomide in Patients with Methylated MGMT Promoter Glioblastoma

Description
This phase III trial compares the effect of adding lomustine to temozolomide and radiation therapy versus temozolomide and radiation therapy alone in shrinking or stabilizing newly diagnosed MGMT methylated glioblastoma. Chemotherapy drugs, such as lomustine and temozolomide, work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. Radiation therapy uses high energy photons to kill tumor cells and shrink tumors. Adding lomustine to usual treatment of temozolomide and radiation therapy may help shrink and stabilize glioblastoma.

Objective
PRIMARY OBJECTIVE:

I. To determine if the regimen with the two alkylating agents temozolomide and lomustine with radiotherapy (RT) significantly prolongs overall survival (OS) versus (vs.) standard chemoradiotherapy with temozolomide in patients with newly diagnosed glioblastoma (GBM) with MGMT promoter methylation.

SECONDARY OBJECTIVES:

I. To determine if the regimen with the two alkylating agents temozolomide and lomustine with radiotherapy (RT) significantly prolongs progression-free survival (PFS) vs. standard chemoradiotherapy with temozolomide in patients with newly diagnosed GBM with MGMT promoter methylation.
II. To compare the two different chemotherapy regimens on patient-reported outcomes (PROs), as measured by the MD Anderson Symptom Inventory - Brain Tumor (MDASI-BT) in patients with newly diagnosed GBM with MGMT promoter methylation.
III. To determine if the regimen with the two alkylating agents temozolomide and lomustine with radiotherapy (RT) is associated with inferior short-term change in patient reported outcomes (PROs) as measured by MDASI-BT vs. standard chemoradiotherapy with temozolomide in patients with newly diagnosed GBM with MGMT promoter methylation.
IV. To assess toxicity in the two different chemotherapy regimens.

EXPLORATORY OBJECTIVES:

I. To assess the association between absolute lymphocyte counts and outcomes. II. To assess the association between CD4+ lymphocyte counts and outcomes. III. To compare the two different chemotherapy regimens in terms of long-term PROs as measured by MDASI-BT at years 1 and 2.

Treatment Active Comparator: Arm I (radiation therapy, temozolomide)
Patients undergo radiation therapy 5 days per week and receive temozolomide PO QD for 6 weeks in the absence of disease progression or unacceptable toxicity. Patients then receive temozolomide PO QD on days 1-5. Treatment repeats every 28 days for 6 cycles in the absence of disease progression or unacceptable toxicity.

Experimental: ARM II (radiation therapy, temozolomide, lomustine)
Patients undergo radiation therapy 5 days per week for 6 weeks in the absence of disease progression or unacceptable toxicity. Patients also receive lomustine PO on day 1 and temozolomide PO QD on days 2-6. Treatment repeats every 42 days for 6 cycles in the absence of disease progression or unacceptable toxicity.

Key Eligibility For full study eligibility, please see this study's clinicaltrials.gov record.

Applicable Disease Sites
Brain/Central Nervous System

Participating Institutions
Johnson Creek, UW Cancer Center; UW Cancer Center at ProHealth; UW Health Eastpark Medical Center; UW Health University Hospital