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Temozolomide and O6-benzylguanine in Treating Patients With Newly Diagnosed, Recurrent, or Progressive Anaplastic Glioma

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00006474
Recruitment Status : Completed
First Posted : January 27, 2003
Last Update Posted : June 20, 2013
National Cancer Institute (NCI)
Information provided by (Responsible Party):
Duke University

Brief Summary:

RATIONALE: Drugs used in chemotherapy use different ways to stop tumor cells from dividing so they stop growing or die. Combining more than one drug may kill more tumor cells.

PURPOSE: Phase I trial to study the effectiveness of combining temozolomide and O6-benzylguanine in treating patients who have newly diagnosed, recurrent, or progressive anaplastic glioma.

Condition or disease Intervention/treatment Phase
Brain and Central Nervous System Tumors Drug: O6-benzylguanine Drug: temozolomide Procedure: conventional surgery Phase 1

Detailed Description:


  • Determine the dose of O6-benzylguanine (O6-BG) effective in producing complete suppression of tumor O6-alkylguanine-DNA alkyltransferase activity in patients with newly diagnosed (closed to accrual 12/19/2000) or recurrent or progressive cerebral anaplastic glioma.
  • Determine the maximum tolerated dose of temozolomide administered after O6-BG in these patients.
  • Determine the toxicity of this regimen in these patients.
  • Determine the anti-tumor response in patients treated with this regimen.

OUTLINE: This is a dose-escalation, multicenter study.

  • Part I: Patients receive escalating doses of O6-benzylguanine (O6-BG) IV continuously for 49 hours until the dose that produces the target depletion of tumor O6-alkylguanine-DNA alkyltransferase (AGT) is determined. Patients undergo a craniotomy after completion of the O6-BG infusion. (closed to accrual 12/19/2000)
  • Part II: After determination of the O6-BG dose in Part I, patients with recurrent malignant gliomas receive O6-BG IV continuously for 49 hours beginning on day 1. Patients also receive oral temozolomide on day 1. Treatment repeats every 28 days in the absence of disease progression or unacceptable toxicity.

Cohorts of 3-6 patients receive escalating doses of temozolomide until the maximum tolerated dose (MTD) is determined. The MTD is defined as the dose at which no more than 1 of 6 patients experiences dose-limiting toxicity.

PROJECTED ACCRUAL: Approximately 20-30 patients (with 14 patients participating in Part II) will be accrued for this study.

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Study Type : Interventional  (Clinical Trial)
Primary Purpose: Treatment
Official Title: Phase I Trial of Temodar Plus O6-Benzylguanine (O6-BG) (NSC 637037) in the Treatment of Patients With Newly Diagnosed (Part 1) or Recurrent/Progressive (Parts 1 and 2) Cerebral Anaplastic Gliomas
Study Start Date : March 2001
Actual Primary Completion Date : August 2004
Actual Study Completion Date : August 2004

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years and older   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No


  • Part I:

    • Histologically confirmed, newly diagnosed glioblastoma multiforme or anaplastic astrocytoma (closed to accrual 12/19/2000)
  • Parts I and II:

    • Histologically confirmed astrocytic, oligodendroglial, or mixed glial tumor

      • Grade III or higher
      • Recurrent or progressive after radiotherapy
  • Evaluable residual disease by contrast-enhanced MRI or CT scan



  • 18 and over

Performance status:

  • Karnofsky 60-100%

Life expectancy:

  • Not specified


  • Granulocyte count at least 1,500/mm3
  • Platelet count at least 100,000/mm3


  • SGOT no greater than 2.5 times upper limit of normal
  • Bilirubin normal


  • Creatinine no greater than 1.5 mg/dL OR
  • Creatinine clearance greater than 60 mL/min
  • BUN no greater than 25 mg/dL


  • Not pregnant or nursing
  • Negative pregnancy test
  • Fertile patients must use effective contraception during and for 2 months after study


Biologic therapy:

  • At least 6 weeks since prior biologic therapy and recovered


  • At least 2 weeks since prior chemotherapy (including but not limited to topotecan) and recovered

    • Patients in trials with one of the following treatment combinations are allowed to enroll 6 weeks after receiving carmustine (BCNU):

      • BCNU on day 1
      • BCNU on day 1 and topotecan on days 1, 8, 15, 22, 29, and 36
      • BCNU on day 1 and irinotecan on days 1, 8, 15, and 22

Endocrine therapy:

  • Patients on corticosteroids must be on a stable dose for at least 2 weeks before study
  • At least 6 weeks since other prior endocrine therapy and recovered


  • See Disease Characteristics
  • At least 6 weeks since prior radiotherapy and recovered


  • Not specified

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00006474

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United States, North Carolina
Duke Comprehensive Cancer Center
Durham, North Carolina, United States, 27710
Sponsors and Collaborators
Duke University
National Cancer Institute (NCI)
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Study Chair: Henry S. Friedman, MD Duke Cancer Institute
Publications of Results:
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Responsible Party: Duke University Identifier: NCT00006474    
Other Study ID Numbers: 1388
CDR0000068301 ( Other Identifier: DUMC )
First Posted: January 27, 2003    Key Record Dates
Last Update Posted: June 20, 2013
Last Verified: February 2013
Keywords provided by Duke University:
recurrent adult brain tumor
adult glioblastoma
adult anaplastic astrocytoma
adult anaplastic oligodendroglioma
adult mixed glioma
adult oligodendroglioma
adult giant cell glioblastoma
adult gliosarcoma
Additional relevant MeSH terms:
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Nervous System Neoplasms
Central Nervous System Neoplasms
Neoplasms, Neuroepithelial
Neuroectodermal Tumors
Neoplasms, Germ Cell and Embryonal
Neoplasms by Histologic Type
Neoplasms, Glandular and Epithelial
Neoplasms, Nerve Tissue
Neoplasms by Site
Nervous System Diseases
Antineoplastic Agents, Alkylating
Alkylating Agents
Molecular Mechanisms of Pharmacological Action
Antineoplastic Agents
Enzyme Inhibitors