Ph I Dose Escalation Trial of Vandetanib in Combo w Etoposide for Malignant Gliomas
Primary Objective: To determine maximum tolerated dose & dose limiting toxicity of vandetanib when combined with standard dosing of etoposide among patients with recurrent malignant glioma who are on & not on enzyme-inducing anti-epileptic drugs (EIAEDs) Secondary Objectives: To assess safety & tolerability of vandetanib + etoposide in this population; To evaluate pharmacokinetics of vandetanib among malignant glioma patients on & not on EIAEDs when combined with etoposide.
Exploratory Objective: To evaluate for evidence of anti-tumor activity of study regimen among recurrent malignant glioma patients including radiographic response rate, 6-month progression free survival (PFS) rate & median PFS.
|Study Design:||Endpoint Classification: Safety/Efficacy Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
|Official Title:||Phase I Dose Escalation of Vandetanib (Zactima, ZD6474) in Combination With Etoposide for Malignant Gliomas|
- Safety, tolerability, biologic activity, & pharmacokinetic profile of vandetanib when used in combo w etoposide [ Time Frame: 6-month progression free survival ] [ Designated as safety issue: Yes ]
|Study Start Date:||February 2008|
|Study Completion Date:||May 2011|
|Primary Completion Date:||October 2010 (Final data collection date for primary outcome measure)|
Experimental: Vandetanib and Etoposide
Patients will be stratified based on whether they are receiving an enzyme-inducing anti-epileptic drug (EIAED). The dose level of vandetanib will be increased in successive cohorts of subjects. Etoposide will be given daily at a dose of 50 mg/ day for 21 days followed by 7 days with no etoposide.
Drug: Vandetanib and Etoposide
Vandetanib will be given orally once day. Swallow tablet with 240 ml of non-carbonated water. Initial dose is 100 mg/day for stratum 1 & 200 mg/day for stratum 2. Etoposide will be taken by mouth in capsule form at a flat dose of 50 mg/day for 1st 21 days of 28-day cycle. You will not take etoposide for following 7 days of the cycle.
This is open-label, single center, 2-cohort phase I dose-escalation study of vandetanib administered orally on continuous daily dosing schedule + oral etoposide among adult patients with recurrent or relapsing malignant glioma. Patients will be stratified based on whether they are receiving EIAEDs & each stratum will independently dose escalate. Dose of vandetanib will be increased in successive cohorts of patients. Etoposide will be given daily at a dose of 50mg/day for 21 days followed by 7 days with no etoposide. Cohorts of 3-6 subjects will accrue at each dose level until maximum tolerated dose (MTD) is defined. Subjects will be adult patients with histologically confirmed malignant glioma who are presenting at time of recurrence/relapse. Up to 48 subjects will be enrolled.
Sample size will be based on modified, classical "3+3" dose escalation design. Primary safety & efficacy analysis will be conducted on all subject data at time all subjects who are still receiving study drug will have completed at least 4 cycles of treatment. Most common adverse events (AEs) associated with vandetanib are rash, diarrhea, & asymptomatic QTc prolongation. Protracted oral dosing of etoposide is associated with toxicity that is mild in most patients & consists mainly of myelosuppression & diarrhea. Less commonly, protracted etoposide dosing has been associated w more significant hematologic toxicity.
|United States, North Carolina|
|Duke University Health System|
|Durham, North Carolina, United States, 27710|
|Principal Investigator:||Annick Desjardins, MD||Duke University Health System|