Skip to content

O6-Benzylguanine and Topical Carmustine in Treating Patients With Early-Stage IA-IIA Cutaneous T-Cell Lymphoma

A Phase I/II Multicenter Clinical Trial of O6Benzylguanine and Topical Carmustine in the Treatment of Refractory Early-Stage (IA-IIA) Cutaneous T-Cell Lymphoma

Status
Completed
Phases
Phase 1Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT00961220
Enrollment
17
Registered
2009-08-18
Start date
2010-02-01
Completion date
2014-04-08
Last updated
2018-05-22

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Recurrent Primary Cutaneous T-Cell Non-Hodgkin Lymphoma, Stage II Mycosis Fungoides and Sezary Syndrome AJCC v7, Stage I Mycosis Fungoides and Sezary Syndrome AJCC v7

Brief summary

This phase I/II trial studies the side effects and best dose of carmustine when given together with O6-benzylguanine and to see how well they work in treating patients with stage IA-IIA cutaneous T-cell lymphoma. Drugs used in chemotherapy, such as carmustine, work in different ways to stop the growth of cancer cells, either by killing the cells or by stopping them from dividing. O6-benzylguanine may help carmustine work better by making cancer cells more sensitive to the drug. Giving O6-benzylguanine with carmustine may kill more cancer cells.

Detailed description

PRIMARY OBJECTIVES: I. To determine the cutaneous T-cell Lymphoma (CTCL) response rate and safety of O6BG (O6-benzylguanine) /BCNU (carmustine) when given biweekly as two consecutive daily doses. SECONDARY OBJECTIVES: I. To determine the laboratory correlates of clinical response and drug efficacy based upon O6-alkylguanine deoxyribonucleic acid (DNA) alkyltransferase (AGT) activity in CTCL lesions will be examined to determine the effects of consecutive day O6BG administration on the extent and duration of AGT depletion. II. To determine the laboratory correlates of clinical response and drug efficacy based upon degree of induction of apoptosis and cell cycle arrest will be examined in the malignant T-cell population of lymphomatous tissue and in the constitutive cells of the skin to determine drug efficacy and toxicity through immunohistochemical techniques. III. To determine the laboratory correlates of clinical response and drug efficacy based upon O-6-methylguanine-DNA methyltransferase (MGMT) gene mutations and changes in AGT expression will be examined as potential mechanisms for O6BG resistance in non-responding patients. OUTLINE: This is a phase I, dose-escalation study of carmustine followed by a phase II study. Patients receive O6-benzylguanine intravenously (IV) over 1 hour and apply topical carmustine to the total skin surface (excluding the lips, eyelids, and ulcerated lesions) 1 hour after completing O6-benzylguanine infusion on days 1-2. Treatment repeats every 2 weeks for up to 12 courses in the absence of disease progression or unacceptable toxicity. After completion of study treatment, patients are followed up at 2 weeks.

Interventions

DRUGCarmustine

Applied topically

OTHERLaboratory Biomarker Analysis

Correlative studies

DRUGO6-Benzylguanine

Given IV

Sponsors

National Cancer Institute (NCI)
Lead SponsorNIH

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
19 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Diagnosis of CTCL stages IA-IIA by histopathology and immunohistochemistry in screening biopsies confirmed at Case Western Reserve University within 6 months of enrollment; biopsies may be performed at the site of collaborating institutions and shipped to University Hospitals of Cleveland-Case Western Reserve University (UHC-CWRU) * Performance status Eastern Cooperative Oncology Group (ECOG) grade 0, 1, or 2 * Patients must have recovered from toxicity of prior treatment and have received no CTCL therapy other than emollition for at least 4 weeks, with the exception of topical corticosteroids, which may be used up to 2 weeks before the trial start date * Patients must have signed a consent form indicating the investigational nature of the treatment and its potential side effects * White blood cell (WBC) at least 3.5 x10E9/L * Absolute neutrophil count (ANC) at least 1.6 x10E9/L * Platelets \> 100,000/ul * Bilirubin \< 1.5 mg/dL * Serum glutamic oxaloacetic transaminase (SGOT) within normal range * Creatinine =\< 1.5 mg/dL * Electrolytes normal * Controlled (diet and insulin) diabetes is permitted * Demonstration of clinically normal lung function based on history and physical examination; patients with clinical evidence of pulmonary disease as determined by the investigator should have baseline lung function tests performed with demonstration of diffusing capacity of the lung for carbon monoxide (DLCO) \>= 70%; a DLCO single breath, adjusted for hemoglobin, will be utilized; we will not use DLCO/alveolar volume (VA) for inclusion or exclusion in this study * Patients must have cutaneous disease that is amenable to biopsy and must be willing to undergo several sequential biopsies * Must have failed at least one conventional treatment for CTCL other than topical corticosteroids; this includes phototherapy, topical mechlorethamine, topical or oral bexarotene, radiation therapy, photopheresis, chemotherapy, and immunomodulatory agents such as interferon and other retinoids

Exclusion criteria

* Patients who have received prior treatment with topical or systemic BCNU or other nitrosoureas * Patients with known central nervous system involvement or primary central nervous system (CNS) malignancies * Patients with performance status ECOG grade 3 or 4 * Pregnant women, women who are breast feeding infants, or women with reproductive potential not practicing adequate contraception * Patients with an active infection which requires hospitalization, or which may affect the patient?s safety if the patient was enrolled * Patients with pulmonary disease as determined by history, physical examination, chest X-ray, or pulse oximetry with \< 70% predicted DLCO * CTCL patients with stage IIB-IVB disease

Design outcomes

Primary

MeasureTime frameDescription
Overall Response RateUp to 2 weeks after completion of study treatmentBased on changes in modified SWAT assessment, patient responses will be classified as complete clinical response (CCR), partial response (PR), stable disease (SD), or progressive disease (PD). SWAT provides an accurate and reproducible assessment of cutaneous disease involvement based on body surface area of involvement and lesional thickness. CCR: No evidence of disease, 100% improvement for a duration of at least 4 weeks. PR: Greater than or equal to 50% decrease in SWAT score compared to baseline and improvement is maintained for at least 4 weeks. SD: Less than 50% decrease in SWAT score compared to baseline. PD: Increase of greater or equal to 25% of the SWAT score compared to baseline while the patient is actively taking the study drug

Secondary

MeasureTime frameDescription
Changes in AGT Inactivation in Non-responding PatientsAfter first course at 2 weeksChanges in AGT levels will be determined by biochemical activity assay from first course to seventh course of treatment.
Changes in AGT (O6-alkylguanine DNA Alkyltransferase) ActivityBaselineExamine AGT depletion at baseline, 24 hrs or 48 hrs, and 1 week after the first Infusion of O6BG. AGT levels will be determined by biochemical activity assay.
Changes in the Apoptosisat 24 hours after the first infusionComparing skin biopsy specimens of BCNU-protected CTCL lesional specimens vs BCNU-treated lesional specimens at 24 hours, using immunohistochemical staining for Ki-67, PCNA, bcl-2, and caspase-3, as well as y2HAX and TUNEL assays. The apoptotic index will be calculated from these results.
Changes in the Cell Cycle/Proliferationat 24 hours after the first infusionComparing skin biopsy specimens of BCNU-protected CTCL lesional specimens vs BCNU-treated lesional specimens at 24 hours, using immunohistochemical staining for Ki-67, PCNA, bcl-2, and caspase-3, as well as y2HAX and TUNEL assays. The proliferation rate will be calculated from these results.
Changes in DNA Damage- Cytotoxicity24 hours after the first infusionImmunohistochemistry will be used to assess expression of these proteins in keratinocytes, epidermal lymphocytes, and dermal lymphocytes, to determine the effects of BCNU cytotoxicity in each subpopulation of cells

Countries

United States

Participant flow

Recruitment details

Patients were recruited from February 2010 to November 2013 from University Hospital Case Medical Center.

Participants by arm

ArmCount
Treatment (O6-benzylguanine, Carmustine)
Patients receive O6-benzylguanine IV over 1 hour and apply topical carmustine to the total skin surface (excluding the lips, eyelids, and ulcerated lesions) 1 hour after completing O6-benzylguanine infusion on days 1-2. Treatment repeats every 2 weeks for up to 12 courses in the absence of disease progression or unacceptable toxicity. O6-benzylguanine: Given IV. 120 mg/m2 over 1 hour Carmustine (BCNU) will begin at a starting dose of 20 mg on Day 1. Beyond this first dose level, for each of the subsequent four patients enrolled, the BCNU dose will be escalated up to a limit of 40 mg total (given on day 1 only). laboratory biomarker analysis: Correlative studies
17
Total17

Withdrawals & dropouts

PeriodReasonFG000
Overall StudyAdverse Event3
Overall StudyComplete Response prior to 12 courses1
Overall StudyLack of Efficacy1
Overall StudyNo IV access for O6BG1
Overall StudyO6BG no longer supplied1

Baseline characteristics

CharacteristicTreatment (O6-benzylguanine, Carmustine)
Age, Customized
20-29 years
2 participants
Age, Customized
30-39 years
5 participants
Age, Customized
40-49 years
4 participants
Age, Customized
50-59 years
2 participants
Age, Customized
60-69 years
3 participants
Age, Customized
70-79 years
1 participants
Ethnicity (NIH/OMB)
Hispanic or Latino
0 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
17 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants
Race (NIH/OMB)
Asian
0 Participants
Race (NIH/OMB)
Black or African American
5 Participants
Race (NIH/OMB)
More than one race
0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants
Race (NIH/OMB)
White
12 Participants
Region of Enrollment
United States
17 participants
Sex: Female, Male
Female
5 Participants
Sex: Female, Male
Male
12 Participants

Adverse events

Event typeEG000
affected / at risk
deaths
Total, all-cause mortality
— / —
other
Total, other adverse events
16 / 17
serious
Total, serious adverse events
0 / 17

Outcome results

Primary

Overall Response Rate

Based on changes in modified SWAT assessment, patient responses will be classified as complete clinical response (CCR), partial response (PR), stable disease (SD), or progressive disease (PD). SWAT provides an accurate and reproducible assessment of cutaneous disease involvement based on body surface area of involvement and lesional thickness. CCR: No evidence of disease, 100% improvement for a duration of at least 4 weeks. PR: Greater than or equal to 50% decrease in SWAT score compared to baseline and improvement is maintained for at least 4 weeks. SD: Less than 50% decrease in SWAT score compared to baseline. PD: Increase of greater or equal to 25% of the SWAT score compared to baseline while the patient is actively taking the study drug

Time frame: Up to 2 weeks after completion of study treatment

Population: Intention to treat

ArmMeasureGroupValue (NUMBER)
Treatment (O6-benzylguanine, Carmustine)Overall Response RateComplete Clinical Response-confirmed6 participants
Treatment (O6-benzylguanine, Carmustine)Overall Response RateComplete Clinical Response-unconfirmed2 participants
Treatment (O6-benzylguanine, Carmustine)Overall Response RatePartial Response8 participants
Treatment (O6-benzylguanine, Carmustine)Overall Response RateProgressive Disease1 participants
Secondary

Changes in AGT Inactivation in Non-responding Patients

Changes in AGT levels will be determined by biochemical activity assay from first course to seventh course of treatment.

Time frame: After seventh course at 14 weeks

Population: Attempts to stain AGT and caspase 3 were unsuccessful and there were no remaining tissues for other outcomes.

Secondary

Changes in AGT Inactivation in Non-responding Patients

Changes in AGT levels will be determined by biochemical activity assay from first course to seventh course of treatment.

Time frame: After first course at 2 weeks

Population: Attempts to stain AGT and caspase 3 were unsuccessful and there were no remaining tissues for other outcomes.

Secondary

Changes in AGT (O6-alkylguanine DNA Alkyltransferase) Activity

Examine AGT depletion at baseline, 24 hrs or 48 hrs, and 1 week after the first Infusion of O6BG. AGT levels will be determined by biochemical activity assay.

Time frame: 48 hours after the first infusion

Population: Attempts to stain AGT and caspase 3 were unsuccessful and there were no remaining tissues for other outcomes.

Secondary

Changes in AGT (O6-alkylguanine DNA Alkyltransferase) Activity

Examine AGT depletion at baseline, 24 hrs or 48 hrs, and 1 week after the first Infusion of O6BG. AGT levels will be determined by biochemical activity assay.

Time frame: 1 week after the first infusion

Population: Attempts to stain AGT and caspase 3 were unsuccessful and there were no remaining tissues for other outcomes.

Secondary

Changes in AGT (O6-alkylguanine DNA Alkyltransferase) Activity

Examine AGT depletion at baseline, 24 hrs or 48 hrs, and 1 week after the first Infusion of O6BG. AGT levels will be determined by biochemical activity assay.

Time frame: Baseline

Population: Attempts to stain AGT and caspase 3 were unsuccessful and there were no remaining tissues for other outcomes.

Secondary

Changes in AGT (O6-alkylguanine DNA Alkyltransferase) Activity

Examine AGT depletion at baseline, 24 hrs or 48 hrs, and 1 week after the first Infusion of O6BG. AGT levels will be determined by biochemical activity assay.

Time frame: 24 hours after the first infusion

Population: Attempts to stain AGT and caspase 3 were unsuccessful and there were no remaining tissues for other outcomes.

Secondary

Changes in DNA Damage- Cytotoxicity

Immunohistochemistry will be used to assess expression of these proteins in keratinocytes, epidermal lymphocytes, and dermal lymphocytes, to determine the effects of BCNU cytotoxicity in each subpopulation of cells

Time frame: 24 hours after the first infusion

Population: Attempts to stain AGT and caspase 3 were unsuccessful and there were no remaining tissues for other outcomes.

Secondary

Changes in DNA Damage- Cytotoxicity

Immunohistochemistry will be used to assess expression of these proteins in keratinocytes, epidermal lymphocytes, and dermal lymphocytes, to determine the effects of BCNU cytotoxicity in each subpopulation of cells

Time frame: 48 hours after the first infusion

Population: Attempts to stain AGT and caspase 3 were unsuccessful and there were no remaining tissues for other outcomes.

Secondary

Changes in the Apoptosis

Comparing skin biopsy specimens of BCNU-protected CTCL lesional specimens vs BCNU-treated lesional specimens at 24 hours, using immunohistochemical staining for Ki-67, PCNA, bcl-2, and caspase-3, as well as y2HAX and TUNEL assays. The apoptotic index will be calculated from these results.

Time frame: at 24 hours after the first infusion

Population: Attempts to stain AGT and caspase 3 were unsuccessful and there were no remaining tissues for other outcomes.

Secondary

Changes in the Apoptosis

Comparing skin biopsy specimens of BCNU-protected CTCL lesional specimens vs BCNU-treated lesional specimens at 48 hours, using immunohistochemical staining for Ki-67, PCNA, bcl-2, and caspase-3, as well as y2HAX and TUNEL assays. The apoptotic index will be calculated from these results.

Time frame: at 48 hours after the first infusion

Population: Attempts to stain AGT and caspase 3 were unsuccessful and there were no remaining tissues for other outcomes.

Secondary

Changes in the Cell Cycle/Proliferation

Comparing skin biopsy specimens of BCNU-protected CTCL lesional specimens vs BCNU-treated lesional specimens at 24 hours, using immunohistochemical staining for Ki-67, PCNA, bcl-2, and caspase-3, as well as y2HAX and TUNEL assays. The proliferation rate will be calculated from these results.

Time frame: at 24 hours after the first infusion

Population: Attempts to stain AGT and caspase 3 were unsuccessful and there were no remaining tissues for other outcomes.

Secondary

Changes in the Cell Cycle/Proliferation

Comparing skin biopsy specimens of BCNU-protected CTCL lesional specimens vs BCNU-treated lesional specimens at 48 hours, using immunohistochemical staining for Ki-67, PCNA, bcl-2, and caspase-3, as well as y2HAX and TUNEL assays. The proliferation rate will be calculated from these results.

Time frame: at 48 hours after the first infusion

Population: Attempts to stain AGT and caspase 3 were unsuccessful and there were no remaining tissues for other outcomes.

Source: ClinicalTrials.gov · Data processed: Feb 27, 2026