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O6-benzylguanine Followed by Surgery in Treating Patients With Solid Tumors That Can Be Removed During Surgery

This study has been completed.
National Cancer Institute (NCI)
Information provided by (Responsible Party):
University of Chicago Identifier:
First received: November 1, 1999
Last updated: March 5, 2014
Last verified: March 2014

RATIONALE: Drugs used in chemotherapy use different ways to stop tumor cells from dividing so they stop growing or die. Giving a chemotherapy drug before surgery may shrink the tumor so that it can be removed during surgery.

PURPOSE: Phase II trial to study the effectiveness of O6-benzylguanine followed by surgery in treating patients who have solid tumors that can be removed during surgery.

Condition Intervention Phase
Unspecified Adult Solid Tumor, Protocol Specific
Drug: O6-benzylguanine
Phase 1

Study Type: Interventional
Study Design: Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: Determination of Optimal O6-Benzylguanine Dose to Achieve O6-Alkylguanine-DNA Alkyltransferase Depletion in Patients With Surgically Resectable Solid Tumors

Resource links provided by NLM:

Further study details as provided by University of Chicago:

Primary Outcome Measures:
  • Determine minimal dose [ Time Frame: 2 years ]
    Determine minimal dose of 06-benzylguanine (06-BG) at which there is a depletion of tumor 06-BG DNA alkyltransferase activity to <10 fmol/mg protein

Enrollment: 25
Study Start Date: October 1999
Study Completion Date: November 2001
Primary Completion Date: November 2001 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Arm A
06-benzylguanine (100mg/m2 16 hrs before anticipated tumor tissue removal)
Drug: O6-benzylguanine

Detailed Description:

OBJECTIVES: I. Determine the minimal O6-benzylguanine (O6-BG) dose required to deplete tumor activity to less than 10 fmol/mg protein at a specified time after administration in patients with surgically resectable solid tumors. II. Correlate tumor tissue AGT depletion with AGT depletion in peripheral blood mononuclear cells (PBMC) obtained at a specified time after O6-BG administration in these patients.

OUTLINE: This is a dose escalation study. Patients receive a single dose of O6-benzylguanine (O6-BG) IV over 1 hour at one of two dose levels. Patients undergo surgery 16-20 hours after administration of O6-BG. Up to 13 patients receive the lower dose level of O6-BG. If more than 3 patients have detectable AGT levels, additional patients receive the higher dose. The optimal biologic dose (OBD) is defined as the lowest dose level at which at least 11 of 13 patients have AGT activity less than 10 fmol/mg protein after O6-BG dosing. Patients are followed at 1 and 3 weeks post surgery.

PROJECTED ACCRUAL: A total of 13-26 patients will be accrued for this study over approximately 10 months.


Ages Eligible for Study:   Child, Adult, Senior
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

DISEASE CHARACTERISTICS: Histologically or cytologically confirmed surgically resectable solid tumor

PATIENT CHARACTERISTICS: Age: Not specified Performance status: CALGB 0-2 Life expectancy: Not specified Hematopoietic: Not specified Hepatic: Bilirubin no greater than 1.5 times upper limit of normal (ULN) Renal: Creatinine no greater than 1.5 times ULN Other: Not pregnant or nursing Medically cleared for surgery No active medical or psychiatric disease that would prevent compliance

PRIOR CONCURRENT THERAPY: Biologic therapy: Not specified Chemotherapy: No prior chemotherapy Endocrine therapy: Not specified Radiotherapy: No prior radiotherapy Surgery: Not specified

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Please refer to this study by its identifier: NCT00003766

United States, Illinois
University of Chicago Cancer Research Center
Chicago, Illinois, United States, 60637-1470
Sponsors and Collaborators
University of Chicago
National Cancer Institute (NCI)
Study Chair: Mark J. Ratain, MD University of Chicago
  More Information

Responsible Party: University of Chicago Identifier: NCT00003766     History of Changes
Other Study ID Numbers: 9523
Study First Received: November 1, 1999
Last Updated: March 5, 2014

Keywords provided by University of Chicago:
unspecified adult solid tumor, protocol specific

Additional relevant MeSH terms:
Antineoplastic Agents
Enzyme Inhibitors
Molecular Mechanisms of Pharmacological Action processed this record on April 24, 2017