RATIONALE: Celecoxib may stop the growth of tumor cells by blocking the enzymes necessary for their growth. It is not yet known whether the effectiveness of celecoxib in treating glioblastoma multiforme is decreased in patients who are receiving anticonvulsant drugs and undergoing radiation therapy. PURPOSE: Phase II trial to study the effectiveness of celecoxib in treating patients who are receiving anticonvulsant drugs and undergoing radiation therapy for newly diagnosed glioblastoma multiforme.
OBJECTIVES: Primary * Determine the effects of hepatic enzyme-inducing drugs, such as anticonvulsants, on the pharmacokinetics of celecoxib in patients with newly diagnosed glioblastoma multiforme undergoing radiotherapy. * Determine the effects of steroids on the pharmacokinetics of celecoxib in these patients. Secondary * Determine the safety of celecoxib in these patients. * Determine the duration of survival of patients treated with this regimen. OUTLINE: This is a multicenter study. Patients are assigned to 1 of 2 groups based on anticonvulsant therapy. * Group A: Patients treated with any of the following anticonvulsant drugs that induce hepatic metabolic enzymes: * Phenytoin * Carbamazepine * Phenobarbital * Primidone * Oxcarbazepine * Group B: Patients treated with any of the following anticonvulsant drugs that cause modest or no induction of hepatic metabolic enzymes OR no anticonvulsant drug: * Gabapentin * Lamotrigine * Valproic acid * Levetiracetam * Tiagabine * Topiramate * Zonisamide * Felbamate * Induction therapy: Patients in both groups receive oral celecoxib twice\* daily on weeks 1-11 and undergo radiotherapy 5 days a week on weeks 2-7. * Maintenance therapy: Patients receive oral celecoxib twice daily. Courses repeat every 4 weeks in the absence of disease progression or unacceptable toxicity. NOTE: \*Patients receive only 1 dose on the first day of celecoxib administration. Patients are followed every 2 months. PROJECTED ACCRUAL: A total of 44 patients (22 per group) will be accrued for this study within approximately 8 months.
Study Type
INTERVENTIONAL
Allocation
NON_RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
35
Radiation is standard treatment 6000cGy in 30 fractions. Patients will receive celecoxib 400 mg bid during RT treatment
Celecoxib will begin 1 week prior to RT at 400mg bid orally. One day 1 only 1 dose will be administered. Starting on day 2 and throughout treatment until progression, 2 doses will be administered at least 12 hours apart. Celecoxib will continue throughout the 6 week course of RT.
H. Lee Moffitt Cancer Center and Research Institute
Tampa, Florida, United States
Winship Cancer Institute of Emory University
Atlanta, Georgia, United States
Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins
Baltimore, Maryland, United States
Massachusetts General Hospital Cancer Center
Boston, Massachusetts, United States
Comprehensive Cancer Center at Wake Forest University
Winston-Salem, North Carolina, United States
Cleveland Clinic Taussig Cancer Center
Cleveland, Ohio, United States
Abramson Cancer Center of the University of Pennsylvania
Philadelphia, Pennsylvania, United States
Effects of Hepatic Enzyme Inducing Drugs Such as Anticonvulsants, on the PK of Celecoxib
subjects will take one dose of celecoxib and will then have 6 hours of blood draws, day 2 subject will take 2 doses of celecoxib 8 hours apart with 2 additional blood samples, one hour apart. Subject, will continue to take 2 doses of celecoxib for 6 weeks, with a sample (PK) drawn every week prior to the first dose of the week. Comparison of Cmax of Celecoxib is reported
Time frame: First dose of celecoxib through completion of radiation, 6 weeks.
Overall Survival
duration of survival when celecoxib is administered concurrently with radiation in pts with newly diagnosed glioblastoma multiforme
Time frame: date pt started treatment to date pt last known alive
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