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Cutaneous T-cell Lymphoma

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Carmustine

O(6)-benzylguanine

Antineoplastic Agents, Alkylating

Alkylating Agents

Enzyme Inhibitors

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.

Laboratory Biomarker Analysis

O6-Benzylguanine

Kevin Cooper

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.

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.

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

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

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.

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.

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.

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.

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.

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

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

National Cancer Institute (NCI)

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

Treatment (O6-benzylguanine, Carmustine)

20-29 years

30-39 years

40-49 years

50-59 years

60-69 years

70-79 years

Age, Customized

Sex: Female, Male

Ethnicity (NIH/OMB)

Race (NIH/OMB)

United States

Region of Enrollment

Dr. Kevin Cooper

Complete Clinical Response-confirmed

Complete Clinical Response-unconfirmed

Partial Response

Progressive Disease

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

carmustine: Applied topically

laboratory biomarker analysis: Correlative studies

Overall Response Rate

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: Applied topically. 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

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

Spots Global Cancer Trial Database for stage i mycosis fungoides and sezary syndrome ajcc v7