A Phase I, Multicenter, Dose Escalation Study of CAT-8015 in Participants With Chronic Leukemia

Sponsor
MedImmune LLC (Industry)
Overall Status
Terminated
CT.gov ID
NCT00587457
Collaborator
Cambridge Antibody Technology (Other)
11
3
3
13
3.7
0.3

Study Details

Study Description

Brief Summary

This was a multicenter, Phase 1, standard 3+3 dose-escalation study to evaluate the safety and anti-neoplastic activity of moxetumomab pasudotox in relapsed or refractory participants with chronic lymphocytic leukemia (CLL), prolymphocytic leukemia (PLL) or Small Lymphocytic Lymphoma (SLL).

Condition or Disease Intervention/Treatment Phase
  • Drug: CAT-8015 5 mcg/kg
  • Drug: CAT-8015 10 mcg/kg
  • Drug: CAT-8015 20 mcg/kg
Phase 1

Detailed Description

This was a multicenter, Phase 1, standard 3+3 dose-escalation study to evaluate the safety and anti-neoplastic activity of CAT-8015 in relapsed or refractory participants with CLL, PLL, or SLL. Participants in the initial dose cohort were to receive CAT-8015 at a dose of 5 microgram per kilogram (mcg/kg) CAT-8015, increasing to 10 mcg/kg in the second dose cohort, and then increasing by 10 mcg/kg increments in subsequent cohorts (that is, to doses of 20, 30, 40, 50, 60 mcg/kg, etc) until a maximum tolerated dose (MTD) was identified. Following identification of the MTD, the MTD cohort was to be expanded to 16 participants.

Study Design

Study Type:
Interventional
Actual Enrollment :
11 participants
Allocation:
Non-Randomized
Intervention Model:
Single Group Assignment
Masking:
None (Open Label)
Primary Purpose:
Treatment
Official Title:
A Phase I, Multicenter, Dose-Escalation Study of CAT-8015 in Patients With Relapsed or Refactory Chronic Lymphocytic Leukemia (CLL) Prolymphocytic Leukemia (PLL), or Small Lymphocytic Leukemia (SLL)
Actual Study Start Date :
Mar 7, 2007
Actual Primary Completion Date :
Apr 7, 2008
Actual Study Completion Date :
Apr 7, 2008

Arms and Interventions

Arm Intervention/Treatment
Experimental: CAT-8015 5 microgram per kilogram (mcg/kg)

Participants received a single intravenous infusion of 5 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible.

Drug: CAT-8015 5 mcg/kg
Participants received a single intravenous infusion of 5 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible.

Experimental: CAT-8015 10 mcg/kg

Participants received a single intravenous infusion of 10 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible.

Drug: CAT-8015 10 mcg/kg
Participants received a single intravenous infusion of 10 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible.

Experimental: CAT-8015 20 mcg/kg

Participants received a single intravenous infusion of 20 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible.

Drug: CAT-8015 20 mcg/kg
Participants received a single intravenous infusion of 20 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible.

Outcome Measures

Primary Outcome Measures

  1. Number of Participants With Treatment Emergent Adverse Events (TEAEs) and Treatment Emergent Serious Adverse Events (TESAEs) [From start of study drug administration until 30 days after the last dose of study drug]

    An adverse event (AE) events present at baseline that worsened in intensity after administration of investigational product or events absent at baseline that emerged after administration of study drug, for the period extending to 30 days after the last dose of study drug. A serious adverse event (SAE) is an AE resulting in any of the following outcomes or deemed significant for any other reason: death; initial or prolonged inpatient hospitalization; life-threatening situation (immediate risk of dying); persistent or significant disability/incapacity; congenital anomaly/birth defect in the offspring of a participant who received moxetumomab pasudotox. Treatment-emergent were events between administration of investigational product and Day 28 that were absent before treatment or that worsened relative to pretreatment state.

  2. Number of Participants With Vital Signs Abnormalities Recorded as Treatment-Emergent Adverse Events (TEAEs) [From start of study drug administration until 30 days after the last dose of study drug]

    The vital sign abnormalities which require an action or intervention by the investigator, or a finding judged by the investigator were reported as an adverse event. TEAEs were events present at baseline that worsened in intensity after administration of study drug or events absent at baseline that emerged after administration of study drug, for the period extending to 30 days after the last dose of study drug.

  3. Number of Participants With Clinically Relevant Electrocardiogram (ECG) Abnormalities Recorded as Adverse Events (AEs) [From start of study drug administration until 30 days after the last dose of study drug]

    AEs observed in participants with clinically significant ECG abnormalities were assessed.

  4. Number of Participants With Clinically Significant Laboratory Abnormalities Recorded as Treatment-Emergent Adverse Events (TEAEs) [From start of study drug administration until 30 days after the last dose of study drug]

    An abnormal laboratory finding which required an action or intervention by the investigator, or a finding judged by the investigator to represent a change beyond the range of normal physiologic fluctuation were reported as an adverse event. Treatment-emergent were events between first dose of study drug and 30 days after the last dose that were absent before treatment or that worsened relative to pretreatment state. Number of participants with grade 3 or higher treatment-emergent adverse events for laboratory abnormalities were reported as clinically relevant laboratory changes.

  5. Number of Participants With Objective Response Rate (ORR): Complete Response (CR) or Partial Response (PR) [Up to 2 years of post-treatment follow-up]

    Objective response rate defined as the proportion of participants with confirmed complete response (CR) or confirmed partial response (PR) according to Response Evaluation Criteria.

  6. Best Overall Objective Tumor Response [Up to 2 years of post-treatment follow-up]

    Antitumor activity was assessed by best overall objective tumor response.

  7. Time to Reach Maximum Observed Plasma Concentration (Tmax) of Moxetumomab Pasudotox [Predose, 0.25 (During Infusion), 0.5 (End of Infusion), 1, 1.5, 2, 4, 8 and 12 hours postdose on Day 1 and 5; Predose and End of Infusion on Day 3]

    The Tmax is the time to reach maximum observed plasma concentration of Moxetumomab Pasudotox.

  8. Maximum Observed Serum Concentration (Cmax) for Moxetumomab Pasudotox [Predose, 0.25 (During Infusion), 0.5 (End of Infusion), 1, 1.5, 2, 4, 8 and 12 hours postdose on Day 1 and 5; Predose and End of Infusion on Day 3]

    The Cmax is the maximum observed plasma concentration of Moxetumomab Pasudotox.

Secondary Outcome Measures

  1. Number of Participants With Positive Neutralizing Antibodies [Up to end of treatment (4-6 weeks after the last dose)]

    Participants tested for immunogenicity to moxetumomab pasudotox prior to enrollment, before each cycle and at end of study. The neutralization assay measures the capacity of participant's plasma (antibodies) to inhibit the binding of moxetumomab pasudotox to its target, cluster of differentiation 22 (CD22), coated onto enzyme linked immunosorbent assay (ELISA) plates. It was used as a direct surrogate for biological activity based on the mechanism of action of this drug. Significant level of neutralizing antibody activity defined as the capacity of test plasma to inhibit greater than (>)50 percentage (%) of the binding of CAT-8015 to CD22 using an ELISA-based method.

  2. Percentage Change From Baseline in Cluster of Differentiation 22 (CD22) Expression [End of treatment (4-6 weeks after the last dose)]

    Participants demonstrated CD22 expression on malignant cells at Screening and CD22 is a regulatory molecule that prevents the over activation of the immune system and the development of autoimmune diseases.

Eligibility Criteria

Criteria

Ages Eligible for Study:
18 Years and Older
Sexes Eligible for Study:
All
Accepts Healthy Volunteers:
No
Inclusion Criteria:
  • Confirmed diagnosis of B-Cell Leukemia [(chronic lymphocytic leukemia (CLL), prolymphocytic leukemia (PLL), or Small lymphocytic leukemia (SLL)]

  • Measurable Disease

  • Disease characteristics: Participants with CLL or SLL are eligible if they have failed 2 or more prior courses of standard chemo and/or biologic therapy (example, Rituxan) and PLL will be eligible if they have failed at least one prior standard chemotherapeutic regimen. Medical indications for treatment include progressive disease-related symptoms, progressive cytopenias due to marrow involvement, progressive or painful splenomegaly or adenopathy, rapidly increasing lymphocytosis, autoimmune hemolytic anemia or thrombocytopenia and increased frequency of infections.

  • Eastern Cooperative Oncology Group (ECOG) performance status of 0-2

  • Participants 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

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

  • Must be able to understand and sign the informed consent

  • Must be at least 18 years old

  • Female and Male participants agree to use an approved method of contraception during the study

Exclusion Criteria:
  • History of allogeneic bone marrow transplant.

  • Documented and ongoing central nervous system involvement with their malignant disease [history of central nervous system (CNS) involvement is not an exclusion criterion]

  • Pregnant or breast-feeding females

  • Participants who 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 alanine aminotransferase (ALT) or aspartate aminotransferase (AST)] or direct bilirubin greater than or equal to Grade 2, unless bilirubin is due to Gilbert's disease

  • Renal function: Serum creatinine clearance is less than or equal to 60 millilitre per minute (mL/min) as estimated by Cockcroft-Gault formula

Hematologic function:
  • The ANC less than 1000/cubic millimeter (cmm), or platelet count less than 50,000/cmm, if these cytopenias are not judged by the investigator to be due to underlying disease (that is, potentially reversible with anti-neoplastic therapy).

  • A participant will not be excluded because of pancytopenia greater than or equal to Grade 3, or erythropoietin dependence, if it is due to disease, based on the results of bone marrow studies.

  • Baseline coagulopathy greater than or equal to grade 3 unless due to anticoagulant therapy

Pulmonary function:
  • Participants with less than 50 percent (%) of predicted forced expiratory volume (FEV-1) or less than 50% of predicted diffusing capacity for carbon monoxide (DLCO) corrected for hemoglobin concentration and alveolar volume. Note: Participants with no prior history of pulmonary illness are not required to have pulmonary function test (PFTs). FEV1 will be assessed after bronchodilator therapy.
Recent prior therapy:
  • Cytotoxic chemotherapy, corticosteroids (except stable doses of prednisone), whole body electron beam radiation therapy, hormonal, biologic or other standard or any investigational therapy of the malignancy for 3 weeks prior to entry into the trial.

  • Less than or equal to 1 month prior monoclonal antibody therapy (that is, rituximab)

  • Participants who are receiving or have received radiation therapy less than 3 weeks prior to study entry will not be excluded providing the volume of the bone marrow treated is less than 10% and also the participant has measurable disease outside the radiation report.

  • Any history of prior pseudomonas - exotoxin immunotoxin administrator

Contacts and Locations

Locations

Site City State Country Postal Code
1 Research Site Indianapolis Indiana United States
2 Research Site Bethesda Maryland United States
3 Research Site Lodz Poland

Sponsors and Collaborators

  • MedImmune LLC
  • Cambridge Antibody Technology

Investigators

  • Study Director: Mark C Lanasa, M.D.,Ph.D, MedImmune LLC

Study Documents (Full-Text)

None provided.

More Information

Publications

None provided.
Responsible Party:
MedImmune LLC
ClinicalTrials.gov Identifier:
NCT00587457
Other Study ID Numbers:
  • CAT-8015-1002
First Posted:
Jan 7, 2008
Last Update Posted:
Jul 6, 2017
Last Verified:
Jun 1, 2017

Study Results

Participant Flow

Recruitment Details
Pre-assignment Detail A total of 11 participants were enrolled, of which all participants discontinued from the treatment.
Arm/Group Title CAT-8015 5 Microgram Per Kilogram (mcg/kg) CAT-8015 10 Microgram Per Kilogram (mcg/kg) CAT-8015 20 Microgram Per Kilogram (mcg/kg)
Arm/Group Description Participants received a single intravenous infusion of 5 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible. Participants received a single intravenous infusion of 10 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible. Participants received a single intravenous infusion of 20 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible.
Period Title: Overall Study
STARTED 3 3 5
COMPLETED 0 0 0
NOT COMPLETED 3 3 5

Baseline Characteristics

Arm/Group Title CAT-8015 5 Microgram Per Kilogram (mcg/kg) CAT-8015 10 Microgram Per Kilogram (mcg/kg) CAT-8015 20 Microgram Per Kilogram (mcg/kg) Total
Arm/Group Description Participants received a single intravenous infusion of 5 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible. Participants received a single intravenous infusion of 10 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible. Participants received a single intravenous infusion of 20 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible. Total of all reporting groups
Overall Participants 3 3 5 11
Age (Years) [Mean (Standard Deviation) ]
Mean (Standard Deviation) [Years]
58.7
(2.3)
62.0
(4.4)
61.6
(7.5)
60.9
(5.4)
Sex: Female, Male (Count of Participants)
Female
1
33.3%
1
33.3%
1
20%
3
27.3%
Male
2
66.7%
2
66.7%
4
80%
8
72.7%

Outcome Measures

1. Primary Outcome
Title Number of Participants With Treatment Emergent Adverse Events (TEAEs) and Treatment Emergent Serious Adverse Events (TESAEs)
Description An adverse event (AE) events present at baseline that worsened in intensity after administration of investigational product or events absent at baseline that emerged after administration of study drug, for the period extending to 30 days after the last dose of study drug. A serious adverse event (SAE) is an AE resulting in any of the following outcomes or deemed significant for any other reason: death; initial or prolonged inpatient hospitalization; life-threatening situation (immediate risk of dying); persistent or significant disability/incapacity; congenital anomaly/birth defect in the offspring of a participant who received moxetumomab pasudotox. Treatment-emergent were events between administration of investigational product and Day 28 that were absent before treatment or that worsened relative to pretreatment state.
Time Frame From start of study drug administration until 30 days after the last dose of study drug

Outcome Measure Data

Analysis Population Description
Safety population included all participants who received any treatment of moxetumomab pasudotox.
Arm/Group Title CAT-8015 5 Microgram Per Kilogram (mcg/kg) CAT-8015 10 Microgram Per Kilogram (mcg/kg) CAT-8015 20 Microgram Per Kilogram (mcg/kg)
Arm/Group Description Participants received a single intravenous infusion of 5 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible. Participants received a single intravenous infusion of 10 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible. Participants received a single intravenous infusion of 20 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible.
Measure Participants 3 3 5
TEAEs
3
100%
3
100%
5
100%
TESAEs
1
33.3%
2
66.7%
3
60%
2. Primary Outcome
Title Number of Participants With Vital Signs Abnormalities Recorded as Treatment-Emergent Adverse Events (TEAEs)
Description The vital sign abnormalities which require an action or intervention by the investigator, or a finding judged by the investigator were reported as an adverse event. TEAEs were events present at baseline that worsened in intensity after administration of study drug or events absent at baseline that emerged after administration of study drug, for the period extending to 30 days after the last dose of study drug.
Time Frame From start of study drug administration until 30 days after the last dose of study drug

Outcome Measure Data

Analysis Population Description
Safety population included all participants who received any treatment of moxetumomab pasudotox.
Arm/Group Title CAT-8015 5 Microgram Per Kilogram (mcg/kg) CAT-8015 10 Microgram Per Kilogram (mcg/kg) CAT-8015 20 Microgram Per Kilogram (mcg/kg)
Arm/Group Description Participants received a single intravenous infusion of 5 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible. Participants received a single intravenous infusion of 10 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible. Participants received a single intravenous infusion of 20 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible.
Measure Participants 3 3 5
Pyrexia
1
(0.56) 33.3%
0
(0.70) 0%
1
(0.29) 20%
Sinus tachycardia
1
33.3%
0
0%
0
0%
3. Primary Outcome
Title Number of Participants With Clinically Relevant Electrocardiogram (ECG) Abnormalities Recorded as Adverse Events (AEs)
Description AEs observed in participants with clinically significant ECG abnormalities were assessed.
Time Frame From start of study drug administration until 30 days after the last dose of study drug

Outcome Measure Data

Analysis Population Description
Safety population included all participants who received any treatment of moxetumomab pasudotox.
Arm/Group Title CAT-8015 5 Microgram Per Kilogram (mcg/kg) CAT-8015 10 Microgram Per Kilogram (mcg/kg) CAT-8015 20 Microgram Per Kilogram (mcg/kg)
Arm/Group Description Participants received a single intravenous infusion of 5 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible. Participants received a single intravenous infusion of 10 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible. Participants received a single intravenous infusion of 20 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible.
Measure Participants 3 3 5
Number [Participants]
0
0%
0
0%
0
0%
4. Primary Outcome
Title Number of Participants With Clinically Significant Laboratory Abnormalities Recorded as Treatment-Emergent Adverse Events (TEAEs)
Description An abnormal laboratory finding which required an action or intervention by the investigator, or a finding judged by the investigator to represent a change beyond the range of normal physiologic fluctuation were reported as an adverse event. Treatment-emergent were events between first dose of study drug and 30 days after the last dose that were absent before treatment or that worsened relative to pretreatment state. Number of participants with grade 3 or higher treatment-emergent adverse events for laboratory abnormalities were reported as clinically relevant laboratory changes.
Time Frame From start of study drug administration until 30 days after the last dose of study drug

Outcome Measure Data

Analysis Population Description
Safety population included all participants who received any treatment of moxetumomab pasudotox.
Arm/Group Title CAT-8015 5 Microgram Per Kilogram (mcg/kg) CAT-8015 10 Microgram Per Kilogram (mcg/kg) CAT-8015 20 Microgram Per Kilogram (mcg/kg)
Arm/Group Description Participants received a single intravenous infusion of 5 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible. Participants received a single intravenous infusion of 10 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible. Participants received a single intravenous infusion of 20 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible.
Measure Participants 3 3 5
Hemoglobin decreased
3
100%
0
0%
1
20%
Platelet count decreased
2
66.7%
1
33.3%
1
20%
Neutrophil count decreased
2
66.7%
0
0%
0
0%
Lymphocyte count decreased
1
33.3%
0
0%
0
0%
White blood cell count decreased
1
33.3%
0
0%
0
0%
Neutropenia
1
33.3%
0
0%
0
0%
Febrile neutropenia
0
0%
1
33.3%
0
0%
Blood albumin decreased
1
33.3%
1
33.3%
2
40%
Blood magnesium decreased
1
33.3%
2
66.7%
0
0%
Blood glucose increased
2
66.7%
0
0%
0
0%
Blood magnesium increased
1
33.3%
1
33.3%
0
0%
Blood phosphorus decreased
1
33.3%
1
33.3%
0
0%
Aspartate aminotransferase increased
0
0%
1
33.3%
0
0%
Blood alkaline phosphatase increased
0
0%
1
33.3%
0
0%
Blood calcium increased
0
0%
1
33.3%
0
0%
Blood glucose decreased
0
0%
0
0%
1
20%
Blood potassium decreased
0
0%
1
33.3%
0
0%
Blood sodium decreased
1
33.3%
0
0%
0
0%
Blood sodium increased
0
0%
1
33.3%
0
0%
Blood triglycerides increased
1
33.3%
0
0%
0
0%
5. Primary Outcome
Title Number of Participants With Objective Response Rate (ORR): Complete Response (CR) or Partial Response (PR)
Description Objective response rate defined as the proportion of participants with confirmed complete response (CR) or confirmed partial response (PR) according to Response Evaluation Criteria.
Time Frame Up to 2 years of post-treatment follow-up

Outcome Measure Data

Analysis Population Description
Safety population included all participants who received any treatment of moxetumomab pasudotox.
Arm/Group Title CAT-8015 5 Microgram Per Kilogram (mcg/kg) CAT-8015 10 Microgram Per Kilogram (mcg/kg) CAT-8015 20 Microgram Per Kilogram (mcg/kg)
Arm/Group Description Participants received a single intravenous infusion of 5 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible. Participants received a single intravenous infusion of 10 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible. Participants received a single intravenous infusion of 20 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible.
Measure Participants 3 3 5
Number [Participants]
0
0%
0
0%
0
0%
6. Primary Outcome
Title Best Overall Objective Tumor Response
Description Antitumor activity was assessed by best overall objective tumor response.
Time Frame Up to 2 years of post-treatment follow-up

Outcome Measure Data

Analysis Population Description
Safety population included all participants who received any treatment of moxetumomab pasudotox.
Arm/Group Title CAT-8015 5 Microgram Per Kilogram (mcg/kg) CAT-8015 10 Microgram Per Kilogram (mcg/kg) CAT-8015 20 Microgram Per Kilogram (mcg/kg)
Arm/Group Description Participants received a single intravenous infusion of 5 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible. Participants received a single intravenous infusion of 10 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible. Participants received a single intravenous infusion of 20 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible.
Measure Participants 3 3 5
Complete response (CR)
0
0%
0
0%
0
0%
Partial Response (PR)
0
0%
0
0%
0
0%
Stable Disease (SD)
2
66.7%
3
100%
2
40%
Progressive Disease (PD)
1
33.3%
0
0%
3
60%
7. Primary Outcome
Title Time to Reach Maximum Observed Plasma Concentration (Tmax) of Moxetumomab Pasudotox
Description The Tmax is the time to reach maximum observed plasma concentration of Moxetumomab Pasudotox.
Time Frame Predose, 0.25 (During Infusion), 0.5 (End of Infusion), 1, 1.5, 2, 4, 8 and 12 hours postdose on Day 1 and 5; Predose and End of Infusion on Day 3

Outcome Measure Data

Analysis Population Description
Safety population included all participants who received any treatment of moxetumomab pasudotox. Here 'n' signifies participants evaluable for specified categories, for each arm, respectively.
Arm/Group Title CAT-8015 5 Microgram Per Kilogram (mcg/kg) CAT-8015 10 Microgram Per Kilogram (mcg/kg) CAT-8015 20 Microgram Per Kilogram (mcg/kg)
Arm/Group Description Participants received a single intravenous infusion of 5 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible. Participants received a single intravenous infusion of 10 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible. Participants received a single intravenous infusion of 20 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible.
Measure Participants 3 3 5
Cycle 1, Day 1 (n=3,3,5)
0.500
0.50
0.500
Cycle 1, Day 5 (n=3,3,5)
0.500
0.500
0.500
Cycle 2, Day 1 (n=2,2,2)
4.25
0.375
0.500
Cycle 2, Day 5 (n=2,2,2)
0.500
0.800
0.500
Cycle 3, Day 1 (n=1,1,2)
0.500
0.500
0.500
Cycle 3, Day 5 (n=1,1,2)
0.500
2.00
0.500
Cycle 4, Day 1 (n=1,NA,NA)
0.500
NA
NA
Cycle 4, Day 5 (n=1,NA,NA)
0.500
NA
NA
Cycle 5, Day 1 (n=1,NA,NA)
0.500
NA
NA
Cycle 5, Day 5 (n=1,NA,NA)
0.500
NA
NA
Cycle 6, Day 1 (n=1,NA,NA)
0.500
NA
NA
Cycle 6, Day 5 (n=1,NA,NA)
0.500
NA
NA
8. Primary Outcome
Title Maximum Observed Serum Concentration (Cmax) for Moxetumomab Pasudotox
Description The Cmax is the maximum observed plasma concentration of Moxetumomab Pasudotox.
Time Frame Predose, 0.25 (During Infusion), 0.5 (End of Infusion), 1, 1.5, 2, 4, 8 and 12 hours postdose on Day 1 and 5; Predose and End of Infusion on Day 3

Outcome Measure Data

Analysis Population Description
Safety population included all participants who received any treatment of moxetumomab pasudotox. Here 'n' signifies participants evaluable for specified categories, for each arm, respectively.
Arm/Group Title CAT-8015 5 Microgram Per Kilogram (mcg/kg) CAT-8015 10 Microgram Per Kilogram (mcg/kg) CAT-8015 20 Microgram Per Kilogram (mcg/kg)
Arm/Group Description Participants received a single intravenous infusion of 5 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible. Participants received a single intravenous infusion of 10 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible. Participants received a single intravenous infusion of 20 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible.
Measure Participants 3 3 5
Cycle 1, Day 1 (n=3,3,5)
97
57.7
180
Cycle 1, Day 5 (n=3,3,5)
80.9
117
206
Cycle 2, Day 1 (n=2,2,2)
94.0
723
156
Cycle 2, Day 5 (n=2,2,2)
50.5
80.8
211
Cycle 3, Day 1 (n=1,1,2)
107
154
160
Cycle 3, Day 5 (n=1,1,2)
93.4
200
266
Cycle 4, Day 1 (n=1,NA,NA)
84.9
NA
NA
Cycle 4, Day 5 (n=1,NA,NA)
86.2
NA
NA
Cycle 5, Day 1 (n=1,NA,NA)
95.0
NA
NA
Cycle 5, Day 5 (n=1,NA,NA)
86.9
NA
NA
Cycle 6, Day 1 (n=1,NA,NA)
93.2
NA
NA
Cycle 6, Day 5 (n=1,NA,NA)
67.0
NA
NA
9. Secondary Outcome
Title Number of Participants With Positive Neutralizing Antibodies
Description Participants tested for immunogenicity to moxetumomab pasudotox prior to enrollment, before each cycle and at end of study. The neutralization assay measures the capacity of participant's plasma (antibodies) to inhibit the binding of moxetumomab pasudotox to its target, cluster of differentiation 22 (CD22), coated onto enzyme linked immunosorbent assay (ELISA) plates. It was used as a direct surrogate for biological activity based on the mechanism of action of this drug. Significant level of neutralizing antibody activity defined as the capacity of test plasma to inhibit greater than (>)50 percentage (%) of the binding of CAT-8015 to CD22 using an ELISA-based method.
Time Frame Up to end of treatment (4-6 weeks after the last dose)

Outcome Measure Data

Analysis Population Description
Safety population included all participants who received any treatment of moxetumomab pasudotox.
Arm/Group Title CAT-8015 5 Microgram Per Kilogram (mcg/kg) CAT-8015 10 Microgram Per Kilogram (mcg/kg) CAT-8015 20 Microgram Per Kilogram (mcg/kg)
Arm/Group Description Participants received a single intravenous infusion of 5 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible. Participants received a single intravenous infusion of 10 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible. Participants received a single intravenous infusion of 20 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible.
Measure Participants 3 3 5
Number [Participants]
0
0%
0
0%
1
20%
10. Secondary Outcome
Title Percentage Change From Baseline in Cluster of Differentiation 22 (CD22) Expression
Description Participants demonstrated CD22 expression on malignant cells at Screening and CD22 is a regulatory molecule that prevents the over activation of the immune system and the development of autoimmune diseases.
Time Frame End of treatment (4-6 weeks after the last dose)

Outcome Measure Data

Analysis Population Description
Safety population included all participants who received any treatment of moxetumomab pasudotox.
Arm/Group Title CAT-8015 5 Microgram Per Kilogram (mcg/kg) CAT-8015 10 Microgram Per Kilogram (mcg/kg) CAT-8015 20 Microgram Per Kilogram (mcg/kg)
Arm/Group Description Participants received a single intravenous infusion of 5 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible. Participants received a single intravenous infusion of 10 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible. Participants received a single intravenous infusion of 20 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible.
Measure Participants 3 3 5
CD22-PE [OF CD5+/CD19+]
-33.65
(27.79)
-10.25
(16.05)
-8.85
(16.19)
(MESF CD22-PE [of CD5+/CD19+])
1139
(1514.6)
-3076
(5982.1)
-342.8
(1816.8)

Adverse Events

Time Frame From start of study drug administration until 30 days after the last dose of study drug
Adverse Event Reporting Description
Arm/Group Title CAT-8015 5 Microgram Per Kilogram (mcg/kg) CAT-8015 10 Microgram Per Kilogram (mcg/kg) CAT-8015 20 Microgram Per Kilogram (mcg/kg)
Arm/Group Description Participants received a single intravenous infusion of 5 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible. Participants received a single intravenous infusion of 10 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible. Participants received a single intravenous infusion of 20 mcg/kg moxetumomab pasudotox (CAT-8015) on Days 1, 3, and 5 of every 28-day cycle and continued cycles of therapy until progressive disease (PD) or until otherwise they become ineligible.
All Cause Mortality
CAT-8015 5 Microgram Per Kilogram (mcg/kg) CAT-8015 10 Microgram Per Kilogram (mcg/kg) CAT-8015 20 Microgram Per Kilogram (mcg/kg)
Affected / at Risk (%) # Events Affected / at Risk (%) # Events Affected / at Risk (%) # Events
Total / (NaN) / (NaN) / (NaN)
Serious Adverse Events
CAT-8015 5 Microgram Per Kilogram (mcg/kg) CAT-8015 10 Microgram Per Kilogram (mcg/kg) CAT-8015 20 Microgram Per Kilogram (mcg/kg)
Affected / at Risk (%) # Events Affected / at Risk (%) # Events Affected / at Risk (%) # Events
Total 1/3 (33.3%) 2/3 (66.7%) 3/5 (60%)
Blood and lymphatic system disorders
Febrile neutropenia 0/3 (0%) 0 1/3 (33.3%) 1 0/5 (0%) 0
Eye disorders
Optic ischaemic neuropathy 0/3 (0%) 0 1/3 (33.3%) 1 0/5 (0%) 0
Infections and infestations
Acute pulmonary histoplasmosis 0/3 (0%) 0 1/3 (33.3%) 1 0/5 (0%) 0
Infection 1/3 (33.3%) 1 1/3 (33.3%) 1 0/5 (0%) 0
Neutropenic infection 0/3 (0%) 0 1/3 (33.3%) 1 0/5 (0%) 0
Pneumonia 1/3 (33.3%) 1 0/3 (0%) 0 1/5 (20%) 1
Investigations
Blood calcium increased 0/3 (0%) 0 1/3 (33.3%) 1 0/5 (0%) 0
Metabolism and nutrition disorders
Tumour lysis syndrome 0/3 (0%) 0 0/3 (0%) 0 1/5 (20%) 1
Musculoskeletal and connective tissue disorders
Back pain 0/3 (0%) 0 0/3 (0%) 0 1/5 (20%) 1
Respiratory, thoracic and mediastinal disorders
Obstructive airways disorder 0/3 (0%) 0 0/3 (0%) 0 1/5 (20%) 1
Other (Not Including Serious) Adverse Events
CAT-8015 5 Microgram Per Kilogram (mcg/kg) CAT-8015 10 Microgram Per Kilogram (mcg/kg) CAT-8015 20 Microgram Per Kilogram (mcg/kg)
Affected / at Risk (%) # Events Affected / at Risk (%) # Events Affected / at Risk (%) # Events
Total 3/3 (100%) 3/3 (100%) 5/5 (100%)
Blood and lymphatic system disorders
Neutropenia 1/3 (33.3%) 1 0/3 (0%) 0 0/5 (0%) 0
Cardiac disorders
Sinus tachycardia 1/3 (33.3%) 1 0/3 (0%) 0 0/5 (0%) 0
Endocrine disorders
Hypothyroidism 0/3 (0%) 0 1/3 (33.3%) 1 0/5 (0%) 0
Eye disorders
Vision blurred 0/3 (0%) 0 1/3 (33.3%) 1 0/5 (0%) 0
Gastrointestinal disorders
Abdominal distension 1/3 (33.3%) 1 1/3 (33.3%) 1 0/5 (0%) 0
Abdominal pain 2/3 (66.7%) 2 0/3 (0%) 0 0/5 (0%) 0
Diarrhoea 1/3 (33.3%) 1 1/3 (33.3%) 1 1/5 (20%) 1
Dysphagia 0/3 (0%) 0 1/3 (33.3%) 1 0/5 (0%) 0
Gingival pain 1/3 (33.3%) 1 0/3 (0%) 0 0/5 (0%) 0
Nausea 1/3 (33.3%) 1 2/3 (66.7%) 2 1/5 (20%) 1
Oral pain 0/3 (0%) 0 1/3 (33.3%) 1 0/5 (0%) 0
Stomatitis 0/3 (0%) 0 1/3 (33.3%) 1 0/5 (0%) 0
Vomiting 0/3 (0%) 0 1/3 (33.3%) 1 0/5 (0%) 0
General disorders
Chills 1/3 (33.3%) 1 0/3 (0%) 0 0/5 (0%) 0
Fatigue 1/3 (33.3%) 1 0/3 (0%) 0 1/5 (20%) 1
Localised oedema 1/3 (33.3%) 5 0/3 (0%) 0 0/5 (0%) 0
Oedema 0/3 (0%) 0 1/3 (33.3%) 1 1/5 (20%) 1
Oedema peripheral 1/3 (33.3%) 2 1/3 (33.3%) 1 0/5 (0%) 0
Pain 0/3 (0%) 0 0/3 (0%) 0 1/5 (20%) 1
Pyrexia 1/3 (33.3%) 1 0/3 (0%) 0 1/5 (20%) 1
Infections and infestations
Cystitis 0/3 (0%) 0 1/3 (33.3%) 1 0/5 (0%) 0
Histoplasmosis 0/3 (0%) 0 1/3 (33.3%) 1 0/5 (0%) 0
Rhinitis 1/3 (33.3%) 1 0/3 (0%) 0 0/5 (0%) 0
Injury, poisoning and procedural complications
Contusion 1/3 (33.3%) 3 0/3 (0%) 0 0/5 (0%) 0
Investigations
Aspartate aminotransferase increased 0/3 (0%) 0 1/3 (33.3%) 1 0/5 (0%) 0
Blood albumin decreased 1/3 (33.3%) 1 1/3 (33.3%) 2 2/5 (40%) 3
Blood alkaline phosphatase increased 0/3 (0%) 0 1/3 (33.3%) 1 0/5 (0%) 0
Blood glucose decreased 0/3 (0%) 0 0/3 (0%) 0 1/5 (20%) 1
Blood glucose increased 2/3 (66.7%) 3 0/3 (0%) 0 0/5 (0%) 0
Blood magnesium decreased 1/3 (33.3%) 1 2/3 (66.7%) 2 0/5 (0%) 0
Blood magnesium increased 1/3 (33.3%) 1 1/3 (33.3%) 2 0/5 (0%) 0
Blood phosphorus decreased 1/3 (33.3%) 1 1/3 (33.3%) 1 0/5 (0%) 0
Blood potassium decreased 0/3 (0%) 0 1/3 (33.3%) 1 0/5 (0%) 0
Blood sodium decreased 1/3 (33.3%) 1 0/3 (0%) 0 0/5 (0%) 0
Blood sodium increased 0/3 (0%) 0 1/3 (33.3%) 1 0/5 (0%) 0
Blood triglycerides increased 1/3 (33.3%) 1 0/3 (0%) 0 0/5 (0%) 0
Blood uric acid increased 1/3 (33.3%) 2 0/3 (0%) 0 0/5 (0%) 0
Haemoglobin decreased 3/3 (100%) 6 0/3 (0%) 0 1/5 (20%) 2
Lymphocyte count decreased 1/3 (33.3%) 1 0/3 (0%) 0 0/5 (0%) 0
Neutrophil count decreased 2/3 (66.7%) 2 0/3 (0%) 0 0/5 (0%) 0
Platelet count decreased 2/3 (66.7%) 3 1/3 (33.3%) 2 1/5 (20%) 1
Protein urine present 0/3 (0%) 0 1/3 (33.3%) 1 0/5 (0%) 0
Urine output decreased 0/3 (0%) 0 1/3 (33.3%) 1 0/5 (0%) 0
White blood cell count decreased 1/3 (33.3%) 2 0/3 (0%) 0 0/5 (0%) 0
Metabolism and nutrition disorders
Decreased appetite 1/3 (33.3%) 1 1/3 (33.3%) 1 0/5 (0%) 0
Hyperuricaemia 0/3 (0%) 0 0/3 (0%) 0 2/5 (40%) 2
Musculoskeletal and connective tissue disorders
Arthralgia 1/3 (33.3%) 1 0/3 (0%) 0 0/5 (0%) 0
Arthritis 0/3 (0%) 0 1/3 (33.3%) 1 0/5 (0%) 0
Musculoskeletal chest pain 0/3 (0%) 0 1/3 (33.3%) 1 0/5 (0%) 0
Musculoskeletal pain 1/3 (33.3%) 1 0/3 (0%) 0 0/5 (0%) 0
Pain in extremity 0/3 (0%) 0 1/3 (33.3%) 1 1/5 (20%) 1
Nervous system disorders
Headache 1/3 (33.3%) 3 1/3 (33.3%) 1 0/5 (0%) 0
Psychiatric disorders
Anxiety 0/3 (0%) 0 0/3 (0%) 0 1/5 (20%) 2
Confusional state 0/3 (0%) 0 1/3 (33.3%) 1 0/5 (0%) 0
Depression 0/3 (0%) 0 1/3 (33.3%) 1 0/5 (0%) 0
Renal and urinary disorders
Haemorrhage urinary tract 0/3 (0%) 0 1/3 (33.3%) 2 0/5 (0%) 0
Urinary incontinence 0/3 (0%) 0 1/3 (33.3%) 1 0/5 (0%) 0
Urinary retention 0/3 (0%) 0 1/3 (33.3%) 1 0/5 (0%) 0
Respiratory, thoracic and mediastinal disorders
Bronchospasm 0/3 (0%) 0 1/3 (33.3%) 1 0/5 (0%) 0
Cough 1/3 (33.3%) 1 1/3 (33.3%) 1 1/5 (20%) 1
Dyspnoea 0/3 (0%) 0 2/3 (66.7%) 3 1/5 (20%) 1
Lung infiltration 0/3 (0%) 0 1/3 (33.3%) 1 0/5 (0%) 0
Oropharyngeal pain 0/3 (0%) 0 0/3 (0%) 0 1/5 (20%) 1
Pleural effusion 1/3 (33.3%) 1 0/3 (0%) 0 0/5 (0%) 0
Pulmonary congestion 1/3 (33.3%) 1 0/3 (0%) 0 0/5 (0%) 0
Skin and subcutaneous tissue disorders
Angioedema 1/3 (33.3%) 1 0/3 (0%) 0 0/5 (0%) 0
Hyperhidrosis 1/3 (33.3%) 1 0/3 (0%) 0 0/5 (0%) 0
Petechiae 0/3 (0%) 0 1/3 (33.3%) 1 0/5 (0%) 0
Rash 1/3 (33.3%) 1 0/3 (0%) 0 0/5 (0%) 0
Vascular disorders
Capillary leak syndrome 1/3 (33.3%) 1 0/3 (0%) 0 0/5 (0%) 0

Limitations/Caveats

The study was terminated early due to unavailability of investigational product.

More Information

Certain Agreements

Principal Investigators are NOT employed by the organization sponsoring the study.

MedImmune has 60 days to review results communications prior to public release and may delete information that compromises ongoing studies or is considered proprietary. This restriction is not intended to compromise the objective scientific integrity of the manuscript, it being understood that results shall be published regardless of outcome.

Results Point of Contact

Name/Title Mark C Lanasa
Organization MedImmune, LLC.
Phone 301-398-0000
Email clinicaltrialenquiries@medimmune.com
Responsible Party:
MedImmune LLC
ClinicalTrials.gov Identifier:
NCT00587457
Other Study ID Numbers:
  • CAT-8015-1002
First Posted:
Jan 7, 2008
Last Update Posted:
Jul 6, 2017
Last Verified:
Jun 1, 2017