Immunotoxin in Treating Patients With Leukemia or Lymphoma

OBJECTIVES:

• Assess the therapeutic efficacy and toxicity of the recombinant immunotoxin LMB-2, an anti-Tac murine monoclonal antibody fragment conjugated to a truncated portion of Pseudomonas exotoxin, in patients with Tac-expressing leukemias and lymphomas.
• Define the pharmacokinetics of LMB-2, including the terminal elimination serum half-life, area under the curve, and volume of distribution.
• Evaluate, in a preliminary manner, the immunogenicity of LMB-2 in these patients.
• Determine the effect of LMB-2 on various components of the circulating cellular immune system.

OUTLINE: This is a dose escalation study.

Patients receive LMB-2 immunotoxin IV over 30 minutes on days 1, 3, and 5. Treatment repeats every 15-21 days for up to 10 courses in the absence of disease progression, neutralizing antibodies, or unacceptable toxicity.

Cohorts of 3-6 patients each receive escalating doses of LMB-2 immunotoxin until the maximum tolerated dose (MTD) is determined. The MTD is defined as the dose at which no more than 1 patient experiences dose limiting toxicity.

PROJECTED ACCRUAL: A maximum of 40 patients will be accrued for this study.

DISEASE CHARACTERISTICS:

• Histologically confirmed Hodgkin's disease, non-Hodgkin's lymphoma, or leukemia in one of the following categories:

• Adult T-cell leukemia or lymphoma (ATL)

• No smoldering ATL
• No limitation on prior therapy
• Cutaneous T-cell lymphoma (CTCL)

• Stages IB-III and failed at least 1 standard therapy
• Stage IV regardless of prior therapy
• Stages I-IV peripheral T-cell lymphoma

• Relapsed after standard chemotherapy
• Ineligible for or refused salvage chemotherapy or bone marrow transplantation (BMT)
• B-cell non-Hodgkin's lymphoma (NHL) of any histology

• Indolent stages II-IV NHL

• Failed at least 1 standard therapy
• Disease symptomatic and requiring treatment
• Aggressive NHL

• Relapsed after standard chemotherapy
• Ineligible for or refused salvage chemotherapy or BMT
• Chronic lymphocytic leukemia (CLL)

• Rai stages III and IV or Binet stage C
• Failed standard therapy and at least 1 salvage chemotherapy
• Primary B-cell prolymphocytic leukemia or prolymphocytic transformation of CLL

• Failed standard therapy and at least 1 salvage chemotherapy
• Hairy cell leukemia

• Failed standard and salvage chemotherapy
• Ineligible for or refused further salvage chemotherapy or BMT
• Acute myelogenous leukemia

• Failed standard chemotherapy
• Ineligible for or refused salvage chemotherapy or BMT
• Stages II-IV Hodgkin's disease

• Failed standard chemotherapy
• Ineligible for curative salvage radiotherapy or chemotherapy
• Ineligible for or refused BMT
• Patients with leukemias or lymphomas not easily classified in above categories who have failed standard therapy and are ineligible for or have refused bone marrow transplant
• Evidence of interleukin-2 receptor-alpha (IL2Ra) expression by one of the following:

• Greater than 10% of malignant cells reactive with anti-Tac by immunohistochemistry
• Greater than 10% of malignant cells from a particular site positive by FACS
• Greater than 400 IL2Ra sites per malignant cell by radiolabeled anti-Tac binding
• Soluble IL2Ra level greater than 1,000 U/mL (normal geometric mean 235, with 95% confidence levels of 112-502 U)
• Hodgkin's disease with measurable disease not amenable to biopsy
• No CNS disease requiring treatment

• Malignant cells in CSF allowed if judged not to represent clinically significant leukemic or lymphomatous meningitis (as in CSF contamination by blood)

PATIENT CHARACTERISTICS:

Age:

• 18 and over

Performance status:

• Karnofsky 50-100%

Life expectancy:

• Greater than 2 months

Hematopoietic:

• Absolute neutrophil count greater than 1,000/mm3*
• Platelet count greater than 50,000/mm3* NOTE: *nonleukemic patients

Hepatic:

• AST and ALT less than 5 times normal

Renal:

• Creatinine less than 2.0 mg/dL OR
• Creatinine clearance greater than 50 mL/min

Pulmonary:

• FEV1, TLC, and DLCO greater than 50% of predicted if pulmonary or mediastinal involvement with tumor greater than one third of total thoracic diameter

Other:

• HIV negative
• Not pregnant
• Fertile patients must use effective contraception
• Serum must neutralize no more than 75% LMB-2 in tissue culture

PRIOR CONCURRENT THERAPY:

Biologic therapy:

• See Disease Characteristics
• At least 3 weeks since prior interferon

Chemotherapy:

• See Disease Characteristics
• At least 3 weeks since prior cytotoxic chemotherapy
• At least 3 weeks since prior retinoids
• No concurrent chemotherapy

Endocrine therapy:

• No concurrent corticosteroids unless begun at least 3 weeks prior to entry and dose not increased during 3 weeks prior to entry

Radiotherapy:

• See Disease Characteristics
• At least 3 weeks since prior whole-body electron beam radiotherapy
• Other radiotherapy allowed within 3 weeks of entry provided less than 10% of marrow irradiated and measurable disease exists outside radiation port

Surgery:

• Not specified

Other:

• See Disease Characteristics
• At least 3 weeks since any prior systemic therapy
• No other concurrent investigational agents