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Safety Study of CAT-8015 Immunooxin in Patients With HCL With Advance Disease

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified April 2007 by Cambridge Antibody Technology.
Recruitment status was:  Recruiting
Information provided by:
Cambridge Antibody Technology Identifier:
First received: April 16, 2007
Last updated: NA
Last verified: April 2007
History: No changes posted

RATIONALE: The CAT-8015 immunotoxin can bind tumor cells and kill them without harming normal cells. This may be an effective treatment for hairy cell leukemia(HCL) that has not responded to chemotherapy, surgery or radiation therapy.

PURPOSE: Phase I dose escalation study to determine the maximum tolerated dose of CAT-8015 immunotoxin in treating patients who have hairy cell leukemia (HCL) that has not responded to treatment.

Condition Intervention Phase
Hairy Cell Leukemia
Drug: Immunotoxin therapy
Drug: CAT-8015 Immunotoxin
Procedure: Biological therapy
Phase 1

Study Type: Interventional
Study Design: Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: A Phase 1, Multicenter, Dose Escalation Study of CAT-8015 in Patient With Relapsed or Refractory Hairy Cell Leukemia (HCL)

Resource links provided by NLM:

Further study details as provided by Cambridge Antibody Technology:

Primary Outcome Measures:
  • Estimate the maximum dose that can be safely administered to a patient
  • Characterize the toxicity profile of CAT-8015
  • Study the clinical pharmacology of CAT-8015
  • Observe anti-tumor activity, if any.

Secondary Outcome Measures:
  • To assess the immunogenic potential of CAT-8015 to induce antibodies
  • To investigate the potential of biomarkers to predict any therapeutic or toxic response.

Estimated Enrollment: 40
Study Start Date: April 2007
Detailed Description:

OUTLINE: Patients receive CAT-8015 IV over 30 minutes on days 1, 3, and 5 followed by rest. Treatment repeats every 4 weeks for up to a total of 10 courses in the absence of dose limiting toxicity, complete response or disease progression. Patients are followed at 1, 3, 6,12,15,18, 21, 24 months following the start of the last treatment cycle.

Cohorts of 3-6 patients each will receive escalating doses of recombinant CAT-8015 until the maximum tolerated dose (MTD) is determined. The MTD is defined as the dose proceeding that at which 2 of 3 or 2 of 6 patients experience dose-limiting toxicity. Once the MTD is determined, between16 to 25 new patients will be added to the MTD cohort depending on how well the CAT-8015 is tolerated.


Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No



  • Confirmed diagnosis of hairy cell leukemia
  • Measurable disease

At least one of the following indications for treatment:

  • Neutropenia (ANC <1000 cells/µL)
  • Anemia (Hgb <10g/dL)
  • Thrombocytopenia (Plt <100,000/µL)
  • An absolute lymphocyte count of >20,000 cells/µL, or
  • Symptomatic splenomegaly
  • Patient’s must have had at least 2 prior systemic therapies. There must have been at least 2 prior courses of purine analog, or 1 if the response to this course lasted <2 years, or if the patient had unacceptable toxicity to purine analog.


Performance status • ECOG 0-2

Life expectancy

• Life expectancy of greater than 6 months, as assessed by the principal investigator


  • Patients with other cancers who meet eligibility criteria and have had less than 5 years of disease free survival will be considered on a case-by-case basis
  • Ability to understand and sign informed consent
  • Female and male patients agree to use an approved method of contraception during the study


  • Documented and ongoing central nervous system involvement with their malignant disease (history of CNS involvement is not an exclusion criterion)
  • History of bone marrow transplant
  • Pregnant or breast-feeding females
  • Patients whose plasma contains either a significant level of antibody to CAT-8015 as measured by ELISA, or antibody that neutralizes the binding of CAT-8015 to CD22 as measured by a competition ELISA.
  • HIV positive serology (due to increased risk of severe infection and unknown interaction of CAT-8015 with antiretroviral drugs)
  • Hepatitis B surface antigen positive
  • Uncontrolled, symptomatic, intercurrent illness including but not limited to: infections requiring systemic antibiotics, congestive heart failure, unstable angina pectoris, cardiac arrhythmia, psychiatric illness, or social situations that would limit compliance with study requirements

Hepatic function: serum transaminases (either ALT or AST) or bilirubin:

• ≥ Grade 2, unless bilirubin is due to Gilbert’s disease

Renal function: serum creatinine clearance ≤60mL/min as estimated by Cockroft-Gault formula

Hematologic function:

  • The ANC <1000/cmm, or platelet count <50,000/cmm, if these cytopenias are not judged by the investigator to be due to underlying disease (i.e. potentially reversible with anti-neoplastic therapy)
  • Baseline coagulopathy > grade 3 unless due to anticoagulant therapy
  • A patient will not be excluded because of pancytopenia ≥ Grade 3, or erythropoietin dependence, if it is due to disease, based on the results of bone marrow studies

Pulmonary function:

• Patients with < 50% of predicted forced expiratory volume (FEV1) or <50% of predicted diffusing capacity for carbon monoxide (DLCO), corrected for hemoglobin concentration and alveolar volume. Note: Patients with no prior history of pulmonary illness are not required to have PFTs. FEV1 will be assessed following bronchodilator therapy.

Recent prior therapy:

  • Cytotoxic chemotherapy (except stable doses of prednisone), whole body electron beam radiation therapy, interferon, retinoids or other systemic therapy, or investigational therapy of the malignancy for 3 weeks prior to entry into the trial
  • Less than or equal to < 3 months prior monoclonal antibody therapy (i.e. rituximab)
  • Patients who have received or are receiving radiation therapy less than 3 weeks prior to study entry will be not be excluded providing the volume of bone marrow treated is less than 10% and also the patient has measurable disease outside the radiation port
  • Any history of pseudomonas-exotoxin (PE) immunotoxin administration
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00462189

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Principal Investigator: Steven E Coutre, MD         
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Warren Grant Megnuson Clinical Center – NCI Clinical Trials Referral Office Recruiting
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Contact: NCI Clinical Trials Referral    888-624-1937      
Principal Investigator: Robert J Kreitman, MD         
Klinika Hamtologii Uniwersytetu Medycznego (Medical University of Lodz) Not yet recruiting
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Contact: Krzysztof Jamroziak, MD    (48) 42 689-5191      
Principal Investigator: Tadeusz Robak, Professor         
United Kingdom
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Surrey, United Kingdom
Contact: Claire Dearden, MD    (44) 20 7352 8171      
Principal Investigator: Claire Dearden, MD         
Sponsors and Collaborators
Cambridge Antibody Technology
  More Information

Publications automatically indexed to this study by Identifier (NCT Number): Identifier: NCT00462189     History of Changes
Other Study ID Numbers: CAT-8015-1001
Study First Received: April 16, 2007
Last Updated: April 16, 2007

Keywords provided by Cambridge Antibody Technology:

Additional relevant MeSH terms:
Leukemia, Hairy Cell
Neoplasms by Histologic Type
Lymphoproliferative Disorders
Lymphatic Diseases
Immunoproliferative Disorders
Immune System Diseases
Immunologic Factors
Physiological Effects of Drugs processed this record on April 27, 2017