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IL-15 Super Agonist ALT-803 to Treat Relapse Of Hematologic Malignancy After Allogeneic SCT

IL-15 Super Agonist ALT-803 to Treat Relapse Of Hematologic Malignancy After Allogeneic Stem Cell Transplantation

Status
Completed
Phases
Phase 1Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT01885897
Enrollment
33
Registered
2013-06-25
Start date
2013-11-11
Completion date
2020-07-31
Last updated
2020-08-12

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Acute Lymphoblastic Leukemia (ALL), Acute Myelogenous Leukemia (AML), Chronic Lymphocytic Leukemia (CLL), Chronic Myelogenous Leukemia (CML), Lymphoma, Myelodysplastic Syndromes (MDS), Myeloma

Keywords

Acute myelogenous leukemia (AML), Acute lymphoblastic leukemia (ALL), Myelodysplastic syndromes (MDS), Lymphoma, Myeloma, Chronic Lymphocytic Leukemia (CLL), Chronic myelogenous leukemia (CML)

Brief summary

This is a multi-center, phase I/II clinical trial for patients who have relapsed more than 60 day after allogeneic transplant for a hematologic malignancy. The study consists of two phases. The dose finding phase is a modified version of a phase I trial and the extended phase is a modified version of a phase II trial. The primary objective of the dose finding phase is to determine the maximum tolerated, minimum efficacious dose (MTD/MED) of a interleukin-15 (IL-15) super agonist complex (ALT-803) when given once weekly for 4 weeks in the outpatient setting. The study will follow a standard 3+3 design of dose escalation for toxicity with an added feature of stopping early if efficacy is confirmed. There are six dose levels of ALT-803 for to determine the MTD/MED: 1, 3, 6, 10, 20, and 30 mcg/kg. Once the MTD/MED for ALT-803 is determined, this cohort will be used in the extended phase. The primary goal of this extended phase is to study the potential efficacy of ALT-803 in this patient population. Efficacy will be measured using rates of remission induction. An optimal Simon's two-stage design will be used in this phase. Stage 1 will enroll 14 patients (including the 6 patients treated at the MTD/MED during the dose finding phase). If 3 or more of these 14 patients respond to ALT-803, the trial will move to stage 2 and enroll an additional 23 patients. If 2 or fewer respond, the study will terminate enrollment early.

Interventions

BIOLOGICALALT-803

Given weekly IV at assigned dose level, ranging from 1mcg/kg to 30mcg/kg.

Sponsors

Masonic Cancer Center, University of Minnesota
Lead SponsorOTHER

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Relapse after previous allogeneic stem cell transplant for one of the following hematologic malignancies (acute myelogenous leukemia, acute lymphoblastic leukemia,myelodysplastic syndromes, lymphoma, myeloma, Chronic lymphocytic Leukemia, chronic myelogenous leukemia): * For non-CML, relapse will be defined based on disease specific morphologic criteria from a bone marrow biopsy and aspirate or recurrence of disease specific cytogenetics. For disease specific definition of relapse, see appendix III. Relapse can be determined morphologically. Equivocal results for relapse should result in a repeated test after an appropriate time interval (suggested 1 month) to determine eligibility. * For CML, relapse will be defined as any cytogenetic evidence of a Philadelphia chromosome or persistence of BCR/ABL rearrangements by molecular testing on at least two measurements over a 6 month interval. If cytogenetics are normal and there is PCR evidence of a BCR/ABL fusion, patients will be eligible if they have evidence of a quantitative increase in CML measured either by quantitative PCR or by fluorescent in situ hybridization (FISH). For Chronic Phase CML patients only: * must have failed (no response in 3 months or incomplete response at 6 months) or refused treatment with a tyrosine-kinase inhibitor (TKI) * must have failed (defined as incomplete response or relapse) or refused DLI * Relapse must have occurred ≥ 60 days after transplant * Prior DLI is allowed, however not within the 30 days before the 1st dose of ALT-803 * Minimum donor chimerism of 10% * ≥ 18 years of age * Karnofsky performance status ≥ 70% (appendix II) * Adequate organ function within 14 days (30 days for cardiac and pulmonary) of enrollment defined as: * Creatinine: ≤ 2.0 mg/dL * Hepatic: SGOT/SGPT \< 5 x upper limit of institutional normal (ULN) * Thyroid Function: Thyroid Stimulating Hormone (TSH) within institutional normal range - patients with thyroid disease are eligible if euthyroid on suppressive or replacement therapy * Pulmonary: PFTs \> 50% of predicted * Cardiac: LVEF by ECHO or MUGA \> 40% * Ability to be off prednisone and other immunosuppressive drugs for at least 30 day before first dose of study drug * Patient agrees to stay within a reasonable distance (i.e. 30 miles) of the study site for the duration of the study treatment and for a minimum of 48 hours after the last dose and has a dedicated care giver as is standard practice for BMT outpatient care * Women of child bearing potential and men with partners of child bearing potential must agree to use effective contraception during therapy and for 4 months after completion of therapy * Voluntary written consent

Exclusion criteria

* Post-transplant lymphoproliferative diseases (often referred to as EBV-associated lymphomas) * Known active CNS leukemia or lymphoma - patients with previously treated CNS disease is permitted if neurologically stable with no ongoing or anticipated need for steroid therapy are eligible * Ongoing active acute or chronic GVHD requiring immunosuppressive therapy or signs of aGVHD or cGVHD requiring treatment * Pregnant or lactating - Women of child bearing potential must have a negative pregnancy test within 14 days of study treatment start * Class II or greater New York Heart Association Functional Classification criteria (appendix II) or serious cardiac arrhythmias likely to increase the risk of cardiac complications of cytokine therapy (e.g. ventricular tachycardia, frequent ventricular ectopy, or supraventricular tachyarrhythmia requiring chronic therapy * Marked baseline prolongation of QT/QTc interval (e.g. demonstration of a QTc interval greater than 500 milliseconds) * New progressive pulmonary infiltrates on screening chest x-ray or chest CT scan for which evaluation with bronchoscopy is not feasible. Infiltrates attributed to infection must be stable/improving (with associated clinical improvement) after 1 week of appropriate therapy (4 weeks for presumed or documented fungal infections). * Active bacterial, fungal, or viral infections - all prior infections must have resolved following optimal therapy * Positive hepatitis C serology or active hepatitis B infection because of the risk of hepatic inflammation and the possible confounding of drug toxicity assessment - chronic asymptomatic viral hepatitis is allowed * HIV positive because the effect of IL-15 viral loads, HIV immunity, and infectivity of proliferating T cells is unknown * History of severe asthma, presently on chronic medications (a history of mild asthma not requiring therapy is eligible)

Design outcomes

Primary

MeasureTime frameDescription
Number of Participants With Dose Limiting Toxicity (DLT) Events4 weeksThe Dose Limiting Toxicity (DLT) is defined as (during first treatment cycle only): * any treatment-emergent grade 3 non-hematologic toxicity lasting more than 48 hours (refer to section 6.2.1.1 for full definition) * any treatment-emergent grade 4 or 5 non-hematologic toxicity of any duration * grade III or IV acute GVHD within 6 weeks after the first ALT-803 dose Maximum Tolerated Dose (MTD) is defined as the dose level where ≤ 1 out of 6 patients has DLT during the first treatment cycle
Number of Participants Experiencing Potential Efficacy of ALT 8034 monthsThe potential efficacy of ALT-803 in this patient population is measured by the responses based on bone marrow examination 1 and 3 months after the last dose of ALT-803. Response was defined as follows: for AML and myelodysplastic syndromes (MDS) using the International Working Group modified criteria, non-Hodgkin lymphoma, and multiple myeloma using the International Myeloma Working Group Uniform Response Criteria, and acute lymphoblastic leukemia using protocol-specified criteria.

Secondary

MeasureTime frameDescription
Number of Participants With Excessive Toxicity4 weeksTo evaluate the safety of the ALT-803 when administered on this schedule. Excessive toxicity is defined as having a grade 3-5 non-hematologic, non-relapse and non-infectious toxicity (except fevers alone) based on the NCI's CTCAE version 4.
Number of Participants With Incidence of Acute Graft Versus Host Disease100 days
Number of Participants With Incidence of Chronic Graft Versus Host Disease1 year

Countries

United States

Participant flow

Participants by arm

ArmCount
ALT-803, IV, 1 mcg/kg
Weekly dose of ALT-803 at assigned dose once a week for 4 weeks.
6
ALT-803, IV, 3 mcg/kg
Weekly dose of ALT-803 at assigned dose once a week for 4 weeks.
3
ALT-803, IV, 6 mcg/kg
Weekly dose of ALT-803 at assigned dose once a week for 4 weeks.
4
ALT-803, IV, 10 mcg/kg
Weekly dose of ALT-803 at assigned dose once a week for 4 weeks.
3
ALT-803, SQ, 6 mcg/kg
Weekly dose of ALT-803 at assigned dose subcutaneously, once a week for 4 weeks.
8
ALT-803, SQ, 10 mcg/kg
Weekly dose of ALT-803 at assigned dose , subcutaneously, once a week for 4 weeks.
9
Total33

Baseline characteristics

CharacteristicTotalALT-803, IV, 3 mcg/kgALT-803, IV, 6 mcg/kgALT-803, IV, 10 mcg/kgALT-803, IV, 1 mcg/kgALT-803, SQ, 6 mcg/kgALT-803, SQ, 10 mcg/kg
Age, Categorical
<=18 years
0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants
Age, Categorical
>=65 years
11 Participants1 Participants3 Participants0 Participants2 Participants2 Participants3 Participants
Age, Categorical
Between 18 and 65 years
22 Participants2 Participants1 Participants3 Participants4 Participants6 Participants6 Participants
Ethnicity (NIH/OMB)
Hispanic or Latino
0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
31 Participants3 Participants4 Participants2 Participants6 Participants7 Participants9 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
2 Participants0 Participants0 Participants1 Participants0 Participants1 Participants0 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Asian
1 Participants0 Participants0 Participants1 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Black or African American
0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
More than one race
0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants
Race (NIH/OMB)
Unknown or Not Reported
1 Participants0 Participants0 Participants0 Participants0 Participants1 Participants0 Participants
Race (NIH/OMB)
White
31 Participants3 Participants4 Participants2 Participants6 Participants7 Participants9 Participants
Region of Enrollment
United States
33 participants3 participants4 participants3 participants6 participants8 participants9 participants
Sex: Female, Male
Female
16 Participants1 Participants1 Participants2 Participants3 Participants4 Participants5 Participants
Sex: Female, Male
Male
17 Participants2 Participants3 Participants1 Participants3 Participants4 Participants4 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
EG003
affected / at risk
EG004
affected / at risk
EG005
affected / at risk
deaths
Total, all-cause mortality
3 / 62 / 34 / 42 / 38 / 88 / 9
other
Total, other adverse events
4 / 62 / 32 / 42 / 38 / 89 / 9
serious
Total, serious adverse events
1 / 61 / 30 / 40 / 36 / 86 / 9

Outcome results

Primary

Number of Participants Experiencing Potential Efficacy of ALT 803

The potential efficacy of ALT-803 in this patient population is measured by the responses based on bone marrow examination 1 and 3 months after the last dose of ALT-803. Response was defined as follows: for AML and myelodysplastic syndromes (MDS) using the International Working Group modified criteria, non-Hodgkin lymphoma, and multiple myeloma using the International Myeloma Working Group Uniform Response Criteria, and acute lymphoblastic leukemia using protocol-specified criteria.

Time frame: 4 months

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
ALT-803, IV, 1 mcg/kgNumber of Participants Experiencing Potential Efficacy of ALT 8030 Participants
ALT-803, IV, 3 mcg/kgNumber of Participants Experiencing Potential Efficacy of ALT 8031 Participants
ALT-803, IV, 6 mcg/kgNumber of Participants Experiencing Potential Efficacy of ALT 8032 Participants
ALT-803, IV, 10 mcg/kgNumber of Participants Experiencing Potential Efficacy of ALT 8030 Participants
ALT-803, SQ, 6 mcg/kgNumber of Participants Experiencing Potential Efficacy of ALT 8031 Participants
ALT-803, SQ, 10 mcg/kgNumber of Participants Experiencing Potential Efficacy of ALT 8030 Participants
Primary

Number of Participants With Dose Limiting Toxicity (DLT) Events

The Dose Limiting Toxicity (DLT) is defined as (during first treatment cycle only): * any treatment-emergent grade 3 non-hematologic toxicity lasting more than 48 hours (refer to section 6.2.1.1 for full definition) * any treatment-emergent grade 4 or 5 non-hematologic toxicity of any duration * grade III or IV acute GVHD within 6 weeks after the first ALT-803 dose Maximum Tolerated Dose (MTD) is defined as the dose level where ≤ 1 out of 6 patients has DLT during the first treatment cycle

Time frame: 4 weeks

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
ALT-803, IV, 1 mcg/kgNumber of Participants With Dose Limiting Toxicity (DLT) Events0 Participants
ALT-803, IV, 3 mcg/kgNumber of Participants With Dose Limiting Toxicity (DLT) Events0 Participants
ALT-803, IV, 6 mcg/kgNumber of Participants With Dose Limiting Toxicity (DLT) Events0 Participants
ALT-803, IV, 10 mcg/kgNumber of Participants With Dose Limiting Toxicity (DLT) Events0 Participants
ALT-803, SQ, 6 mcg/kgNumber of Participants With Dose Limiting Toxicity (DLT) Events0 Participants
ALT-803, SQ, 10 mcg/kgNumber of Participants With Dose Limiting Toxicity (DLT) Events0 Participants
Secondary

Number of Participants With Excessive Toxicity

To evaluate the safety of the ALT-803 when administered on this schedule. Excessive toxicity is defined as having a grade 3-5 non-hematologic, non-relapse and non-infectious toxicity (except fevers alone) based on the NCI's CTCAE version 4.

Time frame: 4 weeks

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
ALT-803, IV, 1 mcg/kgNumber of Participants With Excessive Toxicity0 Participants
ALT-803, IV, 3 mcg/kgNumber of Participants With Excessive Toxicity0 Participants
ALT-803, IV, 6 mcg/kgNumber of Participants With Excessive Toxicity0 Participants
ALT-803, IV, 10 mcg/kgNumber of Participants With Excessive Toxicity0 Participants
ALT-803, SQ, 6 mcg/kgNumber of Participants With Excessive Toxicity0 Participants
ALT-803, SQ, 10 mcg/kgNumber of Participants With Excessive Toxicity0 Participants
Secondary

Number of Participants With Incidence of Acute Graft Versus Host Disease

Time frame: 100 days

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
ALT-803, IV, 1 mcg/kgNumber of Participants With Incidence of Acute Graft Versus Host Disease2 Participants
ALT-803, IV, 3 mcg/kgNumber of Participants With Incidence of Acute Graft Versus Host Disease1 Participants
ALT-803, IV, 6 mcg/kgNumber of Participants With Incidence of Acute Graft Versus Host Disease1 Participants
ALT-803, IV, 10 mcg/kgNumber of Participants With Incidence of Acute Graft Versus Host Disease1 Participants
ALT-803, SQ, 6 mcg/kgNumber of Participants With Incidence of Acute Graft Versus Host Disease1 Participants
ALT-803, SQ, 10 mcg/kgNumber of Participants With Incidence of Acute Graft Versus Host Disease3 Participants
Secondary

Number of Participants With Incidence of Chronic Graft Versus Host Disease

Time frame: 1 year

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
ALT-803, IV, 1 mcg/kgNumber of Participants With Incidence of Chronic Graft Versus Host Disease0 Participants
ALT-803, IV, 3 mcg/kgNumber of Participants With Incidence of Chronic Graft Versus Host Disease0 Participants
ALT-803, IV, 6 mcg/kgNumber of Participants With Incidence of Chronic Graft Versus Host Disease0 Participants
ALT-803, IV, 10 mcg/kgNumber of Participants With Incidence of Chronic Graft Versus Host Disease0 Participants
ALT-803, SQ, 6 mcg/kgNumber of Participants With Incidence of Chronic Graft Versus Host Disease0 Participants
ALT-803, SQ, 10 mcg/kgNumber of Participants With Incidence of Chronic Graft Versus Host Disease0 Participants

Source: ClinicalTrials.gov · Data processed: Mar 14, 2026