Patient case: 84-year-old male with glioblastoma; genetic feature: CDK6

Clinical trial: Erlotinib Compared With Temozolomide or Carmustine in Treating Patients With Recurrent Glioblastoma Multiforme

Summary: RATIONALE: Erlotinib may stop the growth of tumor cells by blocking the enzymes necessary for their growth. Drugs used in chemotherapy, such as temozolomide and carmustine, work in different ways to stop tumor cells from dividing so they stop growing or die. It is not yet known whether erlotinib is more effective than temozolomide or carmustine in treating recurrent glioblastoma multiforme.
  PURPOSE: This randomized phase II trial is studying erlotinib to see how well it works compared to temozolomide or carmustine in treating patients with recurrent glioblastoma multiforme.

Detailed description: OBJECTIVES:
  Primary
  -  Compare the therapeutic activity of erlotinib vs temozolomide or carmustine in patients with recurrent glioblastoma multiforme.
  -  Compare 6-month progression-free survival in patients treated with these drugs.
  Secondary
  -  Compare the safety of these drugs in these patients.
  OUTLINE: This is a randomized, open-label, multicenter study. Patients are stratified according to participating center. Patients are randomized to 1 of 2 treatment arms.
  -  Arm I: Patients receive oral erlotinib* once daily on day 1-28. Courses repeat every 28 days in the absence of disease progression or unacceptable toxicity.
  NOTE: *Patients treated with enzyme inducing anti-epileptic drugs (EIAEDs) receive a higher dose of erlotinib than patients not receiving any anti-epileptic drugs or EIAEDs.
  -  Arm II: Patients who have not received prior temozolomide are assigned to receive temozolomide. Patients who have received prior temozolomide are assigned to receive carmustine. Patients receive 1 of the following treatment regimens:
  -  Patients receive oral temozolomide* once daily on days 1-5. Courses repeat every 28 days in the absence of disease progression or unacceptable toxicity.
  -  Patients receive carmustine IV once daily on days 1-3. Treatment repeats every 56 days for up to 5 courses in the absence of disease progression or unacceptable toxicity.
  NOTE: *Chemotherapy-naïve patients receive a higher dose of temozolomide than patients who have received prior adjuvant chemotherapy.
  Patients are followed every 8 weeks until disease progression and then every 3 months thereafter.
  PROJECTED ACCRUAL: A total of 100-110 patients (50-55 per treatment arm) will be accrued for this study.

Eligibility: DISEASE CHARACTERISTICS:
  -  Histologically or cytologically confirmed glioblastoma multiforme
  -  Some oligodendroglial elements allowed provided they make up < 25% of the tumor
  -  Recurrent disease documented by MRI after prior radiotherapy
  -  At least 1 bidimensionally measurable target lesion ≥ 2 cm by MRI
  -  Undergone prior surgery for recurrent primary brain tumor more than 3 months before study entry
  -  Must have a clearly limited target lesion ≥ 2 cm OR evidence of progressive and measurable target lesion OR a second measurable target lesion outside the surgical area
  PATIENT CHARACTERISTICS:
  Age
  -  Over 18
  Performance status
  -  Karnofsky 70-100%
  Life expectancy
  -  Not specified
  Hematopoietic
  -  Absolute neutrophil count ≥ 1,500/mm^3
  -  Platelet count ≥ 100,000/mm ^3
  Hepatic
  -  AST and ALT < 2.5 times upper limit of normal (ULN)
  -  Bilirubin < 1.5 times ULN
  Renal
  -  Creatinine < 1.5 times ULN
  Cardiovascular
  -  Clinically normal cardiac function
  -  No ischemic heart disease within the past 12 months
  -  No New York Heart Association grade III or IV cardiac insufficiency
  -  No unstable angina
  -  No arryhthmia
  Pulmonary
  -  DLCO > 70% of predicted (for patients randomized to receive erlotinib [arm I] or carmustine [arm II])
  -  No history of pulmonary disease that would affect pulmonary function including any of the following:
  -  Chronic bronchopneumopathy
  -  Pleural effusion
  -  Interstitial pnuemonia
  -  Pulmonary lymphangitis
  Other
  -  Not pregnant or nursing
  -  Negative pregnancy test
  -  Fertile patients must use effective contraception during and for 3 months after study participation
  -  No other malignancy except cone biopsied carcinoma of the cervix or adequately treated basal cell or squamous cell skin cancer
  -  No psychological, familial, sociological, or geographical factors that would preclude study compliance
  PRIOR CONCURRENT THERAPY:
  Biologic therapy
  -  No prior HER-targeted agents
  -  No concurrent growth factors for neutrophil count elevation
  -  No concurrent epoetin alfa
  Chemotherapy
  -  Prior adjuvant temozolomide allowed
  -  At least 4 weeks since prior chemotherapy (6 weeks for nitrosoureas)
  -  No more than 1 prior adjuvant chemotherapy regimen
  -  No prior chemotherapy for recurrent disease
  Endocrine therapy
  -  Must be on a stable or decreasing dose of corticosteroids for at least 2 weeks before study entry
  Radiotherapy
  -  See Disease Characteristics
  -  More than 3 months since prior radiotherapy to the brain
  -  No prior high-dose radiotherapy (> 65 Gy), stereotactic radiosurgery, or internal radiotherapy unless disease recurrence confirmed
  Surgery
  -  See Disease Characteristics
  Other
  -  No prior participation in experimental therapies
  -  No concurrent CYP3A4 inhibitors (e.g., ketoconazole, erythromycin, troleandomycin, cimetidine, or grapefruit juice)
  -  No concurrent warfarin or other coumarin derivatives
  -  Concurrent low-molecular weight heparin allowed
  -  No other concurrent investigational drugs

Relevance to patient case: not relevant