Pharmacokinetics in Patients With Newly Diagnosed High-Grade Glioma Receiving Temozolomide and Radiation Therapy
- Conditions
- Brain and Central Nervous System TumorsThrombocytopenia
- Registration Number
- NCT00471653
- Brief Summary
RATIONALE: Studying samples of blood in the laboratory from patients receiving temozolomide may help doctors learn how temozolomide works in the body. It may also help doctors learn more about how a patient's genes may affect the risk of developing thrombocytopenia.
PURPOSE: This clinical trial is studying the pharmacokinetics in patients with newly diagnosed high-grade glioma receiving temozolomide and radiation therapy.
- Detailed Description
OBJECTIVES:
* Compare the pharmacokinetic (PK) profiles of temozolomide (TMZ) in patients who develop severe thrombocytopenia vs PK profiles in patients who do not develop severe thrombocytopenia while receiving standard first-line therapy for management of newly diagnosed high-grade gliomas.
* Determine if patients who develop thrombocytopenia have any single nucleotide polymorphisms in the O6-methylguanine-DNA methyltransferase gene.
OUTLINE: This is a pilot, prospective, multicenter study.
Patients receive oral temozolomide once daily on days 1-42. Patients also undergo cranial radiotherapy 5 days a week for 6 weeks in the absence of disease progression or unacceptable toxicity.
Blood samples are collected periodically for pharmacokinetic and pharmacogenomic analysis, genotype analysis, plasma temozolomide levels, and MGMT repair gene polymorphism analysis.
After completion of study treatment, patients are followed for 1 month.
PROJECTED ACCRUAL: A total of 150 patients will be accrued for this study.
Recruitment & Eligibility
- Status
- TERMINATED
- Sex
- All
- Target Recruitment
- 10
Not provided
Not provided
Study & Design
- Study Type
- OBSERVATIONAL
- Study Design
- Not specified
- Primary Outcome Measures
Name Time Method Pharmacokinetics (PK) of temozolomide (TMZ) in patients with severe thrombocytopenia after standard first-line therapy as measured by maximum drug concentration (Cmax) Day 1, Day 22, Day 43 Cmax in patients who develop severe thrombocytopenia after receiving standard first-line therapy of temozolomide (TMZ) for management of newly diagnosed high-grade gliomas.
Pharmacokinetic (PK) profile of temozolomide (TMZ) in patients without severe thrombocytopenia after standard first-line therapy as measured by AUC Day 1, Day 22, Day 43 AUC in patients in patients who do not develop severe thrombocytopenia after receiving standard first-line therapy of TMZ for management of newly diagnosed high-grade gliomas.
Pharmacokinetic (PK) profile of temozolomide (TMZ) in patients without severe thrombocytopenia after standard first-line therapy as measured by Cmax Day 1, Day 22, Day 43 Cmax in patients in patients who do not develop severe thrombocytopenia after receiving standard first-line therapy of TMZ for management of newly diagnosed high-grade gliomas.
Pharmacokinetics (PK) of temozolomide (TMZ) in patients with severe thrombocytopenia after standard first-line therapy as measured by Area Under the Curve (AUC) Day 1, Day 22, Day 43 AUC (mg\*h/L)in patients who develop severe thrombocytopenia after receiving standard first-line therapy of temozolomide (TMZ) for management of newly diagnosed high-grade gliomas.
- Secondary Outcome Measures
Name Time Method Presence of single nucleotide polymorphisms in the O6-methylguanine-DNA methyltransferase gene. Day 1 Presence of single nucleotide polymorphisms in the O6-methylguanine-DNA methyltransferase gene of patients who develop thrombocytopenia after receiving standard first-line therapy for management of newly diagnosed high-grade gliomas.
Trial Locations
- Locations (2)
City of Hope Comprehensive Cancer Center
🇺🇸Duarte, California, United States
Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins
🇺🇸Baltimore, Maryland, United States