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NCT00587457

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

Terminated Phase 1 Results posted Last updated 6 July 2017
What this trial tests

Phase 1 trial testing CAT-8015 5 mcg/kg in Leukemia, Lymphoma, Chronic Lymphocytic in 11 participants. Terminated before completion.

Timeline
7 March 2007
Primary endpoint
7 April 2008
7 April 2008

Quick facts

Lead sponsorMedImmune LLC
PhasePhase 1
StatusTerminated
Study typeINTERVENTIONAL
Allocationnon randomized
Designsingle group
Maskingnone
Primary purposetreatment
Enrollment11
Start date7 March 2007
Primary completion7 April 2008
Estimated completion7 April 2008
Sites3 locations across United States, Poland

Drugs / interventions tested

Conditions studied

Sponsor

MedImmune LLC — full company profile →

Who can join

18 and older, any sex, with Leukemia, Lymphoma, Chronic Lymphocytic or Leukemia, Prolymphocytic Leukemia, Small. Patients with the condition only — healthy volunteers not accepted.

Results — posted to ClinicalTrials.gov

Per-arm endpoint measurements with 95% confidence intervals where reported. Source: trial results section.

Number of Participants With Treatment Emergent Adverse Events (TEAEs) and Treatment Emergent Serious Adverse Events (TESAEs) Primary · 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 offs

TEAEs
GroupValue95% CI
CAT-8015 5 Microgram Per Kilogram (mcg/kg)3
CAT-8015 10 Microgram Per Kilogram (mcg/kg)3
CAT-8015 20 Microgram Per Kilogram (mcg/kg)5
TESAEs
GroupValue95% CI
CAT-8015 5 Microgram Per Kilogram (mcg/kg)1
CAT-8015 10 Microgram Per Kilogram (mcg/kg)2
CAT-8015 20 Microgram Per Kilogram (mcg/kg)3
Number of Participants With Vital Signs Abnormalities Recorded as Treatment-Emergent Adverse Events (TEAEs) Primary · 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.

Pyrexia
GroupValue95% CI
CAT-8015 5 Microgram Per Kilogram (mcg/kg)1± 0.56
CAT-8015 10 Microgram Per Kilogram (mcg/kg)0± 0.70
CAT-8015 20 Microgram Per Kilogram (mcg/kg)1± 0.29
Sinus tachycardia
GroupValue95% CI
CAT-8015 5 Microgram Per Kilogram (mcg/kg)1
CAT-8015 10 Microgram Per Kilogram (mcg/kg)0
CAT-8015 20 Microgram Per Kilogram (mcg/kg)0
Number of Participants With Clinically Relevant Electrocardiogram (ECG) Abnormalities Recorded as Adverse Events (AEs) Primary · 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.

GroupValue95% CI
CAT-8015 5 Microgram Per Kilogram (mcg/kg)0
CAT-8015 10 Microgram Per Kilogram (mcg/kg)0
CAT-8015 20 Microgram Per Kilogram (mcg/kg)0
Number of Participants With Clinically Significant Laboratory Abnormalities Recorded as Treatment-Emergent Adverse Events (TEAEs) Primary · 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.

Hemoglobin decreased
GroupValue95% CI
CAT-8015 5 Microgram Per Kilogram (mcg/kg)3
CAT-8015 10 Microgram Per Kilogram (mcg/kg)0
CAT-8015 20 Microgram Per Kilogram (mcg/kg)1
Platelet count decreased
GroupValue95% CI
CAT-8015 5 Microgram Per Kilogram (mcg/kg)2
CAT-8015 10 Microgram Per Kilogram (mcg/kg)1
CAT-8015 20 Microgram Per Kilogram (mcg/kg)1
Neutrophil count decreased
GroupValue95% CI
CAT-8015 5 Microgram Per Kilogram (mcg/kg)2
CAT-8015 10 Microgram Per Kilogram (mcg/kg)0
CAT-8015 20 Microgram Per Kilogram (mcg/kg)0
Lymphocyte count decreased
GroupValue95% CI
CAT-8015 5 Microgram Per Kilogram (mcg/kg)1
CAT-8015 10 Microgram Per Kilogram (mcg/kg)0
CAT-8015 20 Microgram Per Kilogram (mcg/kg)0
White blood cell count decreased
GroupValue95% CI
CAT-8015 5 Microgram Per Kilogram (mcg/kg)1
CAT-8015 10 Microgram Per Kilogram (mcg/kg)0
CAT-8015 20 Microgram Per Kilogram (mcg/kg)0
Neutropenia
GroupValue95% CI
CAT-8015 5 Microgram Per Kilogram (mcg/kg)1
CAT-8015 10 Microgram Per Kilogram (mcg/kg)0
CAT-8015 20 Microgram Per Kilogram (mcg/kg)0
Febrile neutropenia
GroupValue95% CI
CAT-8015 5 Microgram Per Kilogram (mcg/kg)0
CAT-8015 10 Microgram Per Kilogram (mcg/kg)1
CAT-8015 20 Microgram Per Kilogram (mcg/kg)0
Blood albumin decreased
GroupValue95% CI
CAT-8015 5 Microgram Per Kilogram (mcg/kg)1
CAT-8015 10 Microgram Per Kilogram (mcg/kg)1
CAT-8015 20 Microgram Per Kilogram (mcg/kg)2
Number of Participants With Objective Response Rate (ORR): Complete Response (CR) or Partial Response (PR) Primary · 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.

GroupValue95% CI
CAT-8015 5 Microgram Per Kilogram (mcg/kg)0
CAT-8015 10 Microgram Per Kilogram (mcg/kg)0
CAT-8015 20 Microgram Per Kilogram (mcg/kg)0
Best Overall Objective Tumor Response Primary · Up to 2 years of post-treatment follow-up

Antitumor activity was assessed by best overall objective tumor response.

Complete response (CR)
GroupValue95% CI
CAT-8015 5 Microgram Per Kilogram (mcg/kg)0
CAT-8015 10 Microgram Per Kilogram (mcg/kg)0
CAT-8015 20 Microgram Per Kilogram (mcg/kg)0
Partial Response (PR)
GroupValue95% CI
CAT-8015 5 Microgram Per Kilogram (mcg/kg)0
CAT-8015 10 Microgram Per Kilogram (mcg/kg)0
CAT-8015 20 Microgram Per Kilogram (mcg/kg)0
Stable Disease (SD)
GroupValue95% CI
CAT-8015 5 Microgram Per Kilogram (mcg/kg)2
CAT-8015 10 Microgram Per Kilogram (mcg/kg)3
CAT-8015 20 Microgram Per Kilogram (mcg/kg)2
Progressive Disease (PD)
GroupValue95% CI
CAT-8015 5 Microgram Per Kilogram (mcg/kg)1
CAT-8015 10 Microgram Per Kilogram (mcg/kg)0
CAT-8015 20 Microgram Per Kilogram (mcg/kg)3
Time to Reach Maximum Observed Plasma Concentration (Tmax) of Moxetumomab Pasudotox Primary · 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.

Cycle 1, Day 1 (n=3,3,5)
GroupValue95% CI
CAT-8015 5 Microgram Per Kilogram (mcg/kg)0.5000.500 – 0.500
CAT-8015 10 Microgram Per Kilogram (mcg/kg)0.500.500 – 0.500
CAT-8015 20 Microgram Per Kilogram (mcg/kg)0.5000.00 – 0.500
Cycle 1, Day 5 (n=3,3,5)
GroupValue95% CI
CAT-8015 5 Microgram Per Kilogram (mcg/kg)0.5000.500 – 0.500
CAT-8015 10 Microgram Per Kilogram (mcg/kg)0.5000.300 – 0.500
CAT-8015 20 Microgram Per Kilogram (mcg/kg)0.5000.300 – 1.00
Cycle 2, Day 1 (n=2,2,2)
GroupValue95% CI
CAT-8015 5 Microgram Per Kilogram (mcg/kg)4.250.500 – 8.00
CAT-8015 10 Microgram Per Kilogram (mcg/kg)0.3750.250 – 0.500
CAT-8015 20 Microgram Per Kilogram (mcg/kg)0.5000.500 – 0.500
Cycle 2, Day 5 (n=2,2,2)
GroupValue95% CI
CAT-8015 5 Microgram Per Kilogram (mcg/kg)0.500NA – NA
CAT-8015 10 Microgram Per Kilogram (mcg/kg)0.8000.500 – 1.00
CAT-8015 20 Microgram Per Kilogram (mcg/kg)0.5000.500 – 0.500
Cycle 3, Day 1 (n=1,1,2)
GroupValue95% CI
CAT-8015 5 Microgram Per Kilogram (mcg/kg)0.500NA – NA
CAT-8015 10 Microgram Per Kilogram (mcg/kg)0.500NA – NA
CAT-8015 20 Microgram Per Kilogram (mcg/kg)0.5000.500 – 0.500
Cycle 3, Day 5 (n=1,1,2)
GroupValue95% CI
CAT-8015 5 Microgram Per Kilogram (mcg/kg)0.500NA – NA
CAT-8015 10 Microgram Per Kilogram (mcg/kg)2.00NA – NA
CAT-8015 20 Microgram Per Kilogram (mcg/kg)0.5000.500 – 0.500
Cycle 4, Day 1 (n=1,NA,NA)
GroupValue95% CI
CAT-8015 5 Microgram Per Kilogram (mcg/kg)0.500NA – NA
CAT-8015 10 Microgram Per Kilogram (mcg/kg)NANA – NA
CAT-8015 20 Microgram Per Kilogram (mcg/kg)NANA – NA
Cycle 4, Day 5 (n=1,NA,NA)
GroupValue95% CI
CAT-8015 5 Microgram Per Kilogram (mcg/kg)0.500NA – NA
CAT-8015 10 Microgram Per Kilogram (mcg/kg)NANA – NA
CAT-8015 20 Microgram Per Kilogram (mcg/kg)NANA – NA
Maximum Observed Serum Concentration (Cmax) for Moxetumomab Pasudotox Primary · 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.

Cycle 1, Day 1 (n=3,3,5)
GroupValue95% CI
CAT-8015 5 Microgram Per Kilogram (mcg/kg)9759.1 – 107
CAT-8015 10 Microgram Per Kilogram (mcg/kg)57.746.5 – 145
CAT-8015 20 Microgram Per Kilogram (mcg/kg)18063.7 – 351
Cycle 1, Day 5 (n=3,3,5)
GroupValue95% CI
CAT-8015 5 Microgram Per Kilogram (mcg/kg)80.956.4 – 122
CAT-8015 10 Microgram Per Kilogram (mcg/kg)11744.7 – 166
CAT-8015 20 Microgram Per Kilogram (mcg/kg)206108 – 353
Cycle 2, Day 1 (n=2,2,2)
GroupValue95% CI
CAT-8015 5 Microgram Per Kilogram (mcg/kg)94.066.0 – 122
CAT-8015 10 Microgram Per Kilogram (mcg/kg)723146 – 1300
CAT-8015 20 Microgram Per Kilogram (mcg/kg)156134 – 178
Cycle 2, Day 5 (n=2,2,2)
GroupValue95% CI
CAT-8015 5 Microgram Per Kilogram (mcg/kg)50.50.00 – 101
CAT-8015 10 Microgram Per Kilogram (mcg/kg)80.872.3 – 89.2
CAT-8015 20 Microgram Per Kilogram (mcg/kg)211171 – 250
Cycle 3, Day 1 (n=1,1,2)
GroupValue95% CI
CAT-8015 5 Microgram Per Kilogram (mcg/kg)107NA – NA
CAT-8015 10 Microgram Per Kilogram (mcg/kg)154NA – NA
CAT-8015 20 Microgram Per Kilogram (mcg/kg)16063.9 – 257
Cycle 3, Day 5 (n=1,1,2)
GroupValue95% CI
CAT-8015 5 Microgram Per Kilogram (mcg/kg)93.4NA – NA
CAT-8015 10 Microgram Per Kilogram (mcg/kg)200NA – NA
CAT-8015 20 Microgram Per Kilogram (mcg/kg)266156 – 376
Cycle 4, Day 1 (n=1,NA,NA)
GroupValue95% CI
CAT-8015 5 Microgram Per Kilogram (mcg/kg)84.9NA – NA
CAT-8015 10 Microgram Per Kilogram (mcg/kg)NANA – NA
CAT-8015 20 Microgram Per Kilogram (mcg/kg)NANA – NA
Cycle 4, Day 5 (n=1,NA,NA)
GroupValue95% CI
CAT-8015 5 Microgram Per Kilogram (mcg/kg)86.2NA – NA
CAT-8015 10 Microgram Per Kilogram (mcg/kg)NANA – NA
CAT-8015 20 Microgram Per Kilogram (mcg/kg)NANA – NA
Number of Participants With Positive Neutralizing Antibodies Secondary · 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 pe

GroupValue95% CI
CAT-8015 5 Microgram Per Kilogram (mcg/kg)0
CAT-8015 10 Microgram Per Kilogram (mcg/kg)0
CAT-8015 20 Microgram Per Kilogram (mcg/kg)1
Percentage Change From Baseline in Cluster of Differentiation 22 (CD22) Expression Secondary · 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.

CD22-PE [OF CD5+/CD19+]
GroupValue95% CI
CAT-8015 5 Microgram Per Kilogram (mcg/kg)-33.65± 27.79
CAT-8015 10 Microgram Per Kilogram (mcg/kg)-10.25± 16.05
CAT-8015 20 Microgram Per Kilogram (mcg/kg)-8.85± 16.19
(MESF CD22-PE [of CD5+/CD19+])
GroupValue95% CI
CAT-8015 5 Microgram Per Kilogram (mcg/kg)1139± 1514.6
CAT-8015 10 Microgram Per Kilogram (mcg/kg)-3076± 5982.1
CAT-8015 20 Microgram Per Kilogram (mcg/kg)-342.8± 1816.8

Adverse events — posted to ClinicalTrials.gov

Time frame: From start of study drug administration until 30 days after the last dose of study drug. Reporting threshold: 1%. Adverse-event reports describe events observed during the trial — not all are caused by the drug.

CAT-8015 5 Microgram Per Kilogram (mcg/kg)
Serious: 1/3 (33%)
Deaths:
CAT-8015 10 Microgram Per Kilogram (mcg/kg)
Serious: 2/3 (67%)
Deaths:
CAT-8015 20 Microgram Per Kilogram (mcg/kg)
Serious: 3/5 (60%)
Deaths:

Serious adverse events (10 terms)

ReactionSystemCAT-8015 5 Microgram Per K…CAT-8015 10 Microgram Per …CAT-8015 20 Microgram Per …
Febrile neutropeniaBlood and lymphatic system disorders
Optic ischaemic neuropathyEye disorders
Acute pulmonary histoplasmosisInfections and infestations
InfectionInfections and infestations
Neutropenic infectionInfections and infestations
PneumoniaInfections and infestations
Blood calcium increasedInvestigations
Tumour lysis syndromeMetabolism and nutrition disorders
Back painMusculoskeletal and connective tissue disorders
Obstructive airways disorderRespiratory, thoracic and mediastinal disorders
Other adverse events (70 terms — click to expand)

ReactionSystemCAT-8015 5 Microgram Per K…CAT-8015 10 Microgram Per …CAT-8015 20 Microgram Per …
Haemoglobin decreasedInvestigations
Abdominal painGastrointestinal disorders
NauseaGastrointestinal disorders
Blood albumin decreasedInvestigations
Blood glucose increasedInvestigations
Blood magnesium decreasedInvestigations
Neutrophil count decreasedInvestigations
Platelet count decreasedInvestigations
HyperuricaemiaMetabolism and nutrition disorders
DyspnoeaRespiratory, thoracic and mediastinal disorders
NeutropeniaBlood and lymphatic system disorders
Sinus tachycardiaCardiac disorders
HypothyroidismEndocrine disorders
Vision blurredEye disorders
Abdominal distensionGastrointestinal disorders
DiarrhoeaGastrointestinal disorders
DysphagiaGastrointestinal disorders
Gingival painGastrointestinal disorders
Oral painGastrointestinal disorders
StomatitisGastrointestinal disorders
VomitingGastrointestinal disorders
ChillsGeneral disorders
FatigueGeneral disorders
Localised oedemaGeneral disorders
OedemaGeneral disorders
Oedema peripheralGeneral disorders
PainGeneral disorders
PyrexiaGeneral disorders
CystitisInfections and infestations
HistoplasmosisInfections and infestations
RhinitisInfections and infestations
ContusionInjury, poisoning and procedural complications
Aspartate aminotransferase increasedInvestigations
Blood alkaline phosphatase increasedInvestigations
Blood glucose decreasedInvestigations
Blood magnesium increasedInvestigations
Blood phosphorus decreasedInvestigations
Blood potassium decreasedInvestigations
Blood sodium decreasedInvestigations
Blood sodium increasedInvestigations

Most-reported serious reactions: Febrile neutropenia, Optic ischaemic neuropathy, Acute pulmonary histoplasmosis, Infection, Neutropenic infection, Pneumonia, Blood calcium increased, Tumour lysis syndrome.

Data from ClinicalTrials.gov NCT00587457 adverse events section.

Sponsor's own description

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).

Publications & conference data

2 peer-reviewed publications reference this trial (live from Europe PMC):

  1. Moxetumomab pasudotox for hairy cell leukemia: preclinical development to FDA approval.
    Lin AY, Dinner SN. · · 2019 · cited 35× · PMID 31594764 · DOI 10.1182/bloodadvances.2019000507
  2. Antibody-drug conjugates for lymphoma patients: preclinical and clinical evidences.
    Barreca M, Lang N, Tarantelli C, Spriano F, et al · · 2022 · cited 23× · PMID 36654819 · DOI 10.37349/etat.2022.00112

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