Immunotoxin Therapy in Treating Patients With Hairy Cell Leukemia
RATIONALE: An immunotoxin can locate cancer cells and kill them without harming normal cells. This may be an effective treatment for hairy cell leukemia.
PURPOSE: Phase I trial to study the effectiveness of BL22 immunotoxin in treating patients who have refractory or recurrent hairy cell leukemia.
|Study Design:||Primary Purpose: Treatment|
|Official Title:||Phase I Study of BL22, a Recombinant Immunotoxin for Treatment of CD22+ Leukemias and Lymphomas|
|Study Start Date:||December 1998|
- Assess the toxicity and therapeutic efficacy of recombinant BL22 immunotoxin in patients with refractory or recurrent CD22+ hairy cell leukemia.
- Define the pharmacokinetics of this drug, including the terminal elimination serum half-life area under the curve and volume of distribution, in these patients.
- Evaluate the immunogenicity of this drug in these patients.
- Determine the effect of this drug on various components of the circulating cellular immune system in these patients.
OUTLINE: This is a dose-escalation study.
Patients receive recombinant BL22 immunotoxin IV over 30 minutes on days 1, 3, and 5. Treatment repeats at least every 42 days for up to 4 courses in the absence of disease progression and sufficient neutralizing antibodies.
Cohorts of 3-6 patients receive escalating doses of recombinant BL22 immunotoxin until the maximum tolerated dose (MTD) is determined. The MTD is defined as the dose at which no more than 1 of 6 patients experiences dose-limiting toxicity.
PROJECTED ACCRUAL: A maximum of 46 patients will be accrued for this study within 3 years.
|United States, Maryland|
|Warren Grant Magnuson Clinical Center - NCI Clinical Studies Support|
|Bethesda, Maryland, United States, 20892-1182|
|Study Chair:||Robert Kreitman, MD||National Cancer Institute (NCI)|