Gossypol (AT-101) and Temozolomide With or Without Radiation Therapy in Treating Patients With Newly Diagnosed Glioblastoma Multiforme
RATIONALE: Drugs used in chemotherapy, such as gossypol and temozolomide, work in different ways to stop the growth of tumor cells, either by killing the cells or by stopping them from dividing. Radiation therapy uses high-energy x-rays to kill tumor cells. Gossypol may help temozolomide work better by making tumor cells more sensitive to the drug. Gossypol may also make tumor cells more sensitive to radiation therapy. Giving gossypol and temozolomide together with radiation therapy may kill more tumor cells.
PURPOSE: This phase I trial is studying the side effects and best dose of gossypol when given together with temozolomide with or without radiation therapy in treating patients with newly diagnosed glioblastoma multiforme.
|Brain and Central Nervous System Tumors||Drug: R-(-)-gossypol acetic acid Drug: temozolomide Genetic: gene expression analysis Genetic: mutation analysis Genetic: protein expression analysis Other: laboratory biomarker analysis Other: pharmacological study Procedure: adjuvant therapy Radiation: radiation therapy||Phase 1|
|Study Design:||Allocation: Non-Randomized
Masking: Open Label
Primary Purpose: Treatment
|Official Title:||A Phase I, Open Label Study of AT-101 Plus Radiotherapy and Temozolomide and of AT-101 Plus Adjuvant Temozolomide for Patients With Newly-Diagnosed Glioblastoma Multiforme|
- Maximum tolerated dose
- Pharmacokinetic profile of gossypol
- Therapeutic activity
- Cellular and molecular outcomes (intratumoral expression levels of biomarkers, including Bcl-2 family protein expression [e.g., Bcl-2, Bcl-xL, MCl-1, Bax, Bak, BH3 domain], MGMT gene methylation status, and gene expression array)
|Study Start Date:||February 2007|
|Primary Completion Date:||June 2009 (Final data collection date for primary outcome measure)|
- Determine the maximum tolerated dose (MTD) of gossypol (AT-101) when administered with radiotherapy (RT) and concurrent temozolomide (TMZ) in patients with newly diagnosed glioblastoma multiforme.
- Determine the MTD of gossypol when administered with adjuvant TMZ after standard RT and concurrent TMZ in these patients.
- Assess the toxicity of these treatment regimens.
- Assess and describe the pharmacokinetics of gossypol.
- Determine, preliminarily, the therapeutic activities of these regimens.
- Determine the relationship between these regimens and cellular and molecular features identified in tumor biopsy specimens.
OUTLINE: This is a multicenter, open-label, nonrandomized, dose-escalation study of gossypol. Patients are assigned to 1 of 2 treatment groups. Patients who participate in group I are NOT eligible for group II.
- Group I: Patients receive oral gossypol and undergo radiotherapy once daily 5 days a week for up to 6 weeks. Patients also receive oral temozolomide once daily for up to 6 weeks. Treatment continues in the absence of disease progression or unacceptable toxicity.
- Group II: Patients receive oral temozolomide on days 1-5 and oral gossypol once daily on days 1-21. Treatment repeats every 28 days for up to 6 courses in the absence of disease progression or unacceptable toxicity.
Cohorts of 3-10 patients per treatment group receive escalating doses of gossypol until the maximum tolerated dose (MTD) is determined. The MTD is defined as the dose at which 2 of 6 or 3 of 10 patients experience dose-limiting toxicity.
Patients undergo blood collection periodically for pharmacokinetic studies. Tumor tissue samples are examined for biomarkers including, but not limited to, Bcl-2 family protein expression (e.g., Bcl-2, Bcl-xL, MCl-1, Bax, Bak, and BH3 domain), MGMT gene methylation status, and gene expression array.
After completion of study treatment, patients are followed every 2 months.
PROJECTED ACCRUAL: A total of 50 patients will be accrued for this study.
Please refer to this study by its ClinicalTrials.gov identifier: NCT00390403
|United States, Alabama|
|Lurleen Wallace Comprehensive Cancer at University of Alabama - Birmingham|
|Birmingham, Alabama, United States, 35294|
|United States, Florida|
|H. Lee Moffitt Cancer Center and Research Institute at University of South Florida|
|Tampa, Florida, United States, 33612-9497|
|United States, Georgia|
|Winship Cancer Institute of Emory University|
|Atlanta, Georgia, United States, 30322|
|United States, Maryland|
|Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins|
|Baltimore, Maryland, United States, 21231-2410|
|United States, Michigan|
|Josephine Ford Cancer Center at Henry Ford Hospital|
|Detroit, Michigan, United States, 48202|
|United States, North Carolina|
|Wake Forest University Comprehensive Cancer Center|
|Winston-Salem, North Carolina, United States, 27157-1096|
|United States, Ohio|
|Cleveland Clinic Taussig Cancer Center|
|Cleveland, Ohio, United States, 44195|
|United States, Pennsylvania|
|Abramson Cancer Center of the University of Pennsylvania|
|Philadelphia, Pennsylvania, United States, 19104-4283|
|Study Chair:||John Fiveash, MD||University of Alabama at Birmingham|