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

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: NCT00003766
Recruitment Status : Completed
First Posted : February 20, 2004
Last Update Posted : March 6, 2014
National Cancer Institute (NCI)
Information provided by (Responsible Party):
University of Chicago

Brief Summary:

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 or disease Intervention/treatment Phase
Unspecified Adult Solid Tumor, Protocol Specific Drug: O6-benzylguanine Phase 1

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.

Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 25 participants
Intervention Model: Single Group Assignment
Masking: None (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
Study Start Date : October 1999
Actual Primary Completion Date : November 2001
Actual Study Completion Date : November 2001

Arm Intervention/treatment
Experimental: Arm A
06-benzylguanine (100mg/m2 16 hrs before anticipated tumor tissue removal)
Drug: O6-benzylguanine

Primary Outcome Measures :
  1. 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

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Ages Eligible for Study:   Child, Adult, Older Adult
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

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): 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

Responsible Party: University of Chicago Identifier: NCT00003766     History of Changes
Other Study ID Numbers: 9523
First Posted: February 20, 2004    Key Record Dates
Last Update Posted: March 6, 2014
Last Verified: March 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