Clinical trial · Interventional
BL22 Immunotoxin in Treating Patients Previously Treated With Cladribine for Hairy Cell Leukemia
Phase II Trial Of BL22 Immunotoxin In Hairy Cell Leukemia
NCT00074048CI-TRIAL-00003590completedPhase 2ClinicalTrials.gov clinicaltrialsProvenance
- Source
- ClinicalTrials.gov
- Retrieved
- Sep 8, 2026
- Layer
- normalized (units and labels harmonized; values unchanged)
- Run
- ING-CLINICALTRIALS-20260908-000001
Summary
Brief summary (as posted)
RATIONALE: The BL22 immunotoxin can locate tumor cells and kill them without harming normal cells. This may be an effective treatment for hairy cell leukemia that has not responded to treatment with cladribine. PURPOSE: This phase II trial is studying BL22 immunotoxin to see how well it works in treating patients previously treated with cladribine for hairy cell leukemia.
Conditions
Conditions (1)
Free-text conditions as registered, with the CancerIndex entity they were reconciled to and the match type.
| Condition (as posted) | Mapped entity | Match | Confidence |
|---|---|---|---|
| Leukemia | Leukemia | ONTOLOGY_EXACT | 0.90 |
Interventions
Interventions (1)
| Intervention | Type | Mapped drug | Match |
|---|---|---|---|
| BL22 | Drug | — | UNRESOLVED |
Design
Arms and outcomes
Arms (1)
- type
- EXPERIMENTAL
- label
- 1
- description
- BL22 immunotoxin
- interventionNames
- Drug: BL22
Primary outcomes (1)
- measure
- Response rate
- timeFrame
- After even cycle numbers (2,4,6,8,10)
Secondary outcomes (1)
- measure
- Duration of Response: [Timeframe: Date that a response begins with the date that PD is documented.]
- timeFrame
- 30 days after last dose of study drug
Eligibility
Eligibility (as posted)
- Sex
- All
- Minimum age
- 18 Years
Show eligibility criteria text
DISEASE CHARACTERISTICS: * Histologically confirmed hairy cell leukemia * CD22-positive disease by fluorescence-activated cell sorting with anti-CD22 antibody * Meets at least 1 of the following indications for treatment: * Absolute neutrophil count less than 1,000/mm\^3 * Hemoglobin less than 10 g/dL * Platelet count less than 100,000/mm\^3 * Absolute lymphocyte count greater than 20,000/mm\^3 * Symptomatic splenomegaly * Meets 1 of the following response criteria: * No response * Complete response (CR) or partial response (PR) less than 2 years in duration after the last course of prior cladribine * CR or PR less than 4 years in duration after a second or later course of prior cladribine PATIENT CHARACTERISTICS: Age * 18 and over Performance status * ECOG 0-2 Life expectancy * Not specified Hematopoietic * See Disease Characteristics Hepatic * AST and ALT no greater than 2.5 times upper limit of normal (ULN) * Bilirubin no greater than 2.2 mg/dL * Albumin at least 3.0 g/dL Renal * Creatinine no greater than 1.4 mg/dL OR * Creatinine clearance at least 50 mL/min Cardiovascular * No symptomatic congestive heart failure * No unstable angina pectoris * No cardiac arrhythmia Other * Not pregnant or nursing * Negative pregnancy test * Fertile patients must use effective contraception * No serum that neutralizes more than 75% of the activity of 1 µg/mL of BL22 immunotoxin using a bioassay * No ongoing or active infection * No psychiatric illness or social situation that would preclude study compliance * No other concurrent uncontrolled illness that would preclude study participation * Understand and give informed consent PRIOR CONCURRENT THERAPY: Biologic therapy * No prior BL22 immunotoxin * More than 12 weeks since prior monoclonal antibody therapy Chemotherapy * See Disease Characteristics * More than 4 weeks since prior systemic cytotoxic chemotherapy Endocrine therapy * More than 4 weeks since prior systemic steroids (except stable doses of prednisone no greater than 20 mg/day) Radiotherapy * Not specified Surgery * Not specified Other * No other concurrent investigational agents
References
Publications (1)
- DERIVEDMatsushita K, Margulies I, Onda M, Nagata S, Stetler-Stevenson M, Kreitman RJ. Soluble CD22 as a tumor marker for hairy cell leukemia. Blood. 2008 Sep 15;112(6):2272-7. doi: 10.1182/blood-2008-01-131987. Epub 2008 Jul 2. PMID 18596230