LMB-7 Immunotoxin in Treating Patients With Leptomeningeal Metastases

Protocol for a Phase I Study of Intrathecal LMB-7 (Single-Chain Immunotoxin Constructed From Monoclonal Antibody B3-Pseudomonas Exotoxin PE 38) [IND 5863, NSC 658931] in the Treatment of Patients With Leptomeningeal Neoplasms

Status

Completed

Phases

Phase 1

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT00003020

Enrollment

Registered

2004-05-19

Start date

1997-09-30

Completion date

2000-09-30

Last updated

2013-02-20

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

Conditions

Brain and Central Nervous System Tumors

Keywords

leptomeningeal metastases

Brief summary

RATIONALE: LMB-7 immunotoxin can locate tumor cells and kill them without harming normal cells. PURPOSE: Phase I trial to study the effectiveness of LMB-7 immunotoxin in treating patients who have leptomeningeal metastases metastases.

Detailed description

OBJECTIVES: I. Determine the toxicity of intrathecal LMB-7 immunotoxin in patients with leptomeningeal metastases. II. Identify objective therapeutic responses in this group of patients. OUTLINE: This is a dose escalation study. Patients receive LMB-7 intrathecally on days 1, 3, and 5. Treatment may be repeated every 4 weeks if the patient does not demonstrate HAMA neutralizing antibodies to PE-38 in CSF, has stable or responding disease, and has not experienced greater than grade II toxicity. Three to six patients are entered at each dose level. Dose escalation continues until the maximum tolerated dose (MTD) is determined. The MTD is defined as the dose preceding that at which 2 of 6 patients experience grade 3 or worse toxicity or a neuroradiology toxicity score of 10 or greater. PROJECTED ACCRUAL: Approximately 15 to 24 patients will be accrued over one year.

Interventions

BIOLOGICALLMB-7 immunotoxin

Study design

Primary purpose

TREATMENT

Eligibility

Sex/Gender

ALL

Age

18 Years to No maximum

Healthy volunteers

Inclusion criteria

DISEASE CHARACTERISTICS: Histologically proven primary intracranial or extraneural neoplasm with leptomeningeal metastases At least 30% of malignant cells in the cerebrospinal fluid, primary tumor, or metastatic tumor must react with the B3 mouse monoclonal antibody PATIENT CHARACTERISTICS: Age: 18 and over Performance status: Karnofsky 50-100% Life expectancy: Not specified Hematopoietic: ANC greater than 1000/mm3 Platelet count greater than 100,000/mm3 Hepatic: Bilirubin less than 1.5 mg/dL Renal: Creatinine less than 1.2 mg/dL Pulmonary: DLCO at least 60 Other: No neutralizing antibodies to Pseudomonas exotoxin Not pregnant or nursing Not allergic to penicillin PRIOR CONCURRENT THERAPY: Biologic therapy: Not specified Chemotherapy: No chemotherapy within past 4 weeks (6 weeks for nitrosoureas) unless there is evidence of disease progression in CNS No concurrent chemotherapy Endocrine therapy: Patients receiving corticosteroids must be on stable dose for 10 days prior to entry Radiotherapy: No radiotherapy to disease site within past 3 months unless there is evidence of disease progression in CNS No concurrent radiotherapy Surgery: Not specified

Countries

United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026