This is a Phase I/II, open-label, multi-center, competitive enrollment and dose escalation study of N-803 in patients with relapsed or refractory multiple myeloma.
The purpose of this study is to evaluate the safety, determine the Maximum Tolerated Dose (MTD) or the Minimum Efficacious Dose (MED) and characterize the immunogenicity and pharmacokinetic profile of N-803 in treated patients. The effect of N-803 on the peripheral absolute lymphocyte counts and white blood cell counts, the number and phenotype of peripheral blood T (total and subsets) and NK cells will be evaluated. The anti-tumor responses of N-803 will also be assessed in this trial.
Study Type
INTERVENTIONAL
Allocation
NON_RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
19
Intravenous infusion for cohort 1, 2, 3 and 4; subcutaneous injection for cohort 5, 6 and 7; two 6-week treatment cycles: ALT-803 on Day 1, 8, 15, 22; stable or benefitting patients may receive up to two additional 6-week cycles
University of Minnesota Masonic Cancer Center
Minneapolis, Minnesota, United States
Washington University School of Medicine
St Louis, Missouri, United States
Roswell Park Cancer Institute
Buffalo, New York, United States
Thomas Jefferson University
Philadelphia, Pennsylvania, United States
Number of Participants With Treatment Emergent Adverse Events
For phase I - Number of Participants with Treatment Emergent Adverse Events that occur or worsen after the first dose of study treatment.
Time frame: 24 weeks
Disease Response Rate of Treated Patients
CR- negative SIFE and UIFE, disappearance of any soft tissue plasmacytomas, and \< or = to 5% plasma cells in bone marrow VGPR - either + SIFE and UIFE and - SPEP and UPEP or reduction in serum M-protein \> or = to 90% and urine m-protein level \<100mg per 24h PR - if measurable serum an urine m-protein them reduction of serum m-protein by \>=50% and reduction in 24h urinary m protein by \>=90% or to \<200mg per 24h if unmeasurable serum and urine m-protein then \>= 50% decrease in the difference between involve and uninvolved FLC levels If unmeasurable serum and urine m-protein and serum FLC assay then \>= 50% reduction in plasma cells, provide baseline bone marrow plasma cell percentage was \>=30% In addition to the above listed criteria, if present at baseline, a \>=50% reduction in the size of soft tissue plasmacytomas is also required PD - defined via International Myeloma Working Group uniform response criteria: disease progression SD - not meeting criteria for CR, VGPR, PR or PD
Time frame: Starts at Week 11 - 12 and Week 23 - 24
Characterization of the Pharmacokinetic Profile - Half-life (t½)
Half-life (t½) - The period of time required for the concentration or amount of drug in the body to be reduced by one-half.
Time frame: PK timepoint up to 72 hours +/- 6 hours
Characterization of the Pharmacokinetic Profile - Time of the Observed Maximum Concentration (Tmax)
time of the observed maximum concentration (Tmax)
Time frame: PK timepoint up to 72 hours +/- 6 hours
Characterization of the Pharmacokinetic Profile - Maximum Observed Concentration (Cmax)
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maximum observed concentration (Cmax)
Time frame: PK timepoint up to 72 hours +/- 6 hours
Characterization of the Pharmacokinetic Profile - Area Under the Plasma Concentration Curve
Area under the plasma concentration curve from time 0 through the last measurable concentration (AUC0-t). PK samples were obtained from the start of treatment until 72 hours. The AUC0-168 and AUC0-inf were calculated with noncompartmental pharmacokinetic analysis equations.
Time frame: Samples were collected and the AUC was determined at 24 hours and at time t (last measurable concentration). The AUC was calculated for 168 hours and time to infinity.
Characterization of the Pharmacokinetic Profile - Clearance (CL)
Clearance (CL)
Time frame: PK timepoint up to 72 hours +/- 6 hours
Characterization of the Pharmacokinetic Profile - Vss Volume of Distribution at Steady State
Vss Volume of distribution at steady state is a ratio of the total amount of drug in the body to the plasma concentration of the drugs such that Vd = amount of drug in body/plasma drug concentration
Time frame: PK timepoint up to 72 hours +/- 6 hours
Immunogenicity - Anti-drug Antibody (ADA)
Number of patients with a positive Anti-drug Antibody (ADA) result
Time frame: From Baseline up to Week 12
Characterization of the Pharmacokinetic Profile - Apparent (Extravascular) Clearance (CL/F)
Apparent (Extravascular) Clearance (CL/F)
Time frame: PK timepoint up to 72 hours +/- 6 hours
Characterization of the Pharmacokinetic Profile - Apparent (Extravascular) Volume of Distribution (Vz/F)
Apparent volume of distribution is a ratio of the total amount of drug in the body to the plasma concentration of the drugs such that Vd = amount of drug in body/plasma drug concentration
Time frame: PK timepoint up to 72 hours +/- 6 hours