ClinicalTrials.gg
CompletedNCT02689453Updated Apr 29, 2022Results posted

Subcutaneous Recombinant Human IL-15 (s.c. rhIL-15) and Alemtuzumab for People With Refractory or Relapsed Chronic and Acute Adult T-cell Leukemia (ATL)

A Phase 1 interventional study of IL-15 plus and alemtuzumab in T-Cell Lymphoma Relapsed, Adult T-Cell Leukemia (ATL) and Peripheral T-Cell Lymphoma (PTCL), sponsored by National Cancer Institute (NCI). Completed at 1 site in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2022-04-29.

Sponsored by National Cancer Institute (NCI) · Phase 1, Interventional, and Treatment

Phase
Phase 1
Study type
Interventional
Enrollment
11
Allocation
Non-randomized
Ages
18 Years and older
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-12

Among 20 studies in Leukemia-Lymphoma, Adult T-Cell with a site in United States — 3 open to participants now, 5 under way, none of them phase 3. Leukemia-Lymphoma, Adult T-Cell · United States.

Enrollment
13th of 15
11 · median 19
Started
2017
with 1 other
Phase 1
4 of 20
none open now
Registered
14th of 20
by date
Lead sponsor
8 of 20
National Cancer Institute (NCI)

Among the 20 studies in Leukemia-Lymphoma, Adult T-Cell with a site in United States, this one is the 13th largest by enrollment of the 15 interventional ones that give a count, is one of 2 that started in 2017, is one of 4 in phase 1, and was the 14th registered.

Leukemia-Lymphoma, Adult T-Cell

31 studies on the registry are indexed under Leukemia-Lymphoma, Adult T-Cell; 5 are open to participants now.

Browse Leukemia-Lymphoma, Adult T-Cell studies →

Open to participants now

3 of the 20 studies in Leukemia-Lymphoma, Adult T-Cell with a site in United States are open now. Recruiting first, the newest first:

All 3 open studies →

A study can be open while its sites in United States have not opened yet or have stopped. Only those recruiting at a site in United States →

Who these studies take

Of the 5 Leukemia-Lymphoma, Adult T-Cell studies recruiting now, 3 set no upper age limit and 1 stops at 75 or younger; none take children under 18; none take healthy volunteers.

This study: 18 Years and older · all sexes · no healthy volunteers.

The full table on the hub →

This tab as a report to print or save as PDF → With an account.

Was this useful?
Watch this landscapeDownload CSVNarrow it in search →With an account: a weekly mail of what changed among 20 studies in Leukemia-Lymphoma, Adult T-Cell with a site in United States, or all of them as a file.
02

Study summary

Background:

Adult T-cell leukemia (ATL) is a rare blood cancer. Researchers want to see if a combination of two drugs - recombinant human interleukin 15 (rhIL-15) and alemtuzumab - is a better treatment for ATL.

Objectives:

To test if giving rhIL-15 combined with alemtuzumab improves the outcome of therapy for ATL. Also, to determine the safe dose of this combination and identify side effects and effects on the immune system.

Eligibility:

Adults 18 years and older with chronic or acute ATL who have not been helped by other treatments.

Design:

Participants will be screened with tests that are mostly part of their usual cancer care. They will sign a separate consent form for this.

Weeks 1 and 2: Participants will have a total of 10 visits. They will:

  • Get rhIL-15 under the skin by needle.
  • Have a physical exam and vital signs measured.
  • Give blood samples.
  • Answer questions about their health and their medicines.

Week 3: Participants will stay in the clinic. They will:

  • Get alemtuzumab infusions in a vein through a small catheter on days 1, 2, 3, and 5.
  • Take medicines to decrease side effects.
  • Have a computed tomography (CT) scan to evaluate the treatment.
  • Have a physical exam and vital signs measured.
  • Give blood samples.

Answer questions about their health and medicines.

Weeks 4, 5, and 6 will repeat week 3, without the CT scan. Some patients will just have outpatient visits these weeks.

After treatment, participants will have follow-up visits every few months for up to 2 years. At these visits, participants will give blood samples and have CT scans.

Read the detailed description

Background:

  • A previous trial alemtuzumab (CAMPATH-1) in patients with chronic, acute and lymphomatous subtype HTLV-1 associated ATL showed appreciable initial activity but no clear long-term impact.
  • Antibody dependent cellular cytotoxicity (ADCC) with polymorphonuclear neutrophils (PMNs), monocytes and natural killer (NK) cells acting as the effector cells is alemtuzumab s primary in vivo mechanism of action for depleting malignant leukemic or lymphomatous cells.
  • The immunologic effects of Interleukin-15 (IL-15), a stimulatory cytokine that promotes the differentiation and activation of NK cells, monocytes and long-term cluster of differentiation 8 (CD8+) memory Tcells, has been assessed in several phase I trials in cancer patients.
  • Administration of recombinant human (rh) IL-15 as an intravenous bolus (IVB), continuous intravenous infusion (CIV) or subcutaneous injections (SC) into adult cancer patients has produced 5 to 50 fold expansion in the number of circulating NK cells at well tolerated doses in these patients.
  • Preclinical murine lymphoid malignancy models have shown efficacy from the administration of IL-15 and monoclonal antibodies, with improved survival compared to controls.

Objective:

-To determine the safety, toxicity profile and the maximum tolerated dose (MTD) of s.c. rhIL-15 in combination with standard three times per week IV alemtuzumab treatment.

Eligibility:

  • Age greater than or equal to 18 years old
  • Eastern Cooperative Oncology Group (ECOG) Performance Status less than or equal to 1
  • Diagnosis of adult T-cell leukemia (Human T-cell lymphotropic virus type 1 (HTLV-1) associated, chronic or acute), peripheral T-cell lymphoma (angioimmunoblastic, hepatosplenic, or not otherwise specified), cutaneous T-cell lymphoma (Stage III or IV, with leukemia involvement or erythrodemia), or T-cell prolymphocytic leukemia (T-PLL)
  • Measurable or evaluable disease
  • Adequate organ and bone marrow function as defined in the protocol.

Design:

  • This is a single institution nonrandomized Phase I dose escalation study evaluating increasing doses of subcutaneous (SC) rhIL-15 in combination with alemtuzumab using a standard 3 + 3 dose escalation.
  • Treatment will include s.c. rhIL015 daily Monday-Friday (M-F) weeks 1 and 2 (dose levels 0.5- 2 mcg/kg/dose), followed by intravenous (IV) alemtuzumab beginning in week 3 (escalating doses followed by standard dosing in weeks 4-6).
  • Up to 30 patients will be enrolled in this study.
03

Conditions studied

  • T-Cell Lymphoma Relapsed
  • Adult T-Cell Leukemia (ATL)
  • Peripheral T-Cell Lymphoma (PTCL)
  • Cutaneous T Cell Lymphoma (CTCL)
  • T-Cell Prolymphocytic Leukemia

Keywords

  • T-cell Lymphoproliferative Disorder
  • CD4/CD25 Expressing T-cells in Blood and Lymphoid Tissues
  • Anti-CD52 Monoclonal Antibody
  • Antibody Dependent Cellular Cytotoxicity
04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Eligibility criteria

  • INCLUSION CRITERIA:

Inclusion Criteria

  • Age greater than or equal to 18 years; no upper age limit.
  • Patients diagnosed with a leukemia or lymphoma as follows:

    • Chronic or acute leukemia forms of Human T-cell lymphotropic virus type 1 (HTLV-1) associated adult T-cell leukemia;
    • Peripheral T-cell lymphoma (angioimmunoblastic, hepatosplenic, or not otherwise specified); or,
    • Cutaneous T-cell lymphoma stage III or IV with circulating monoclonal cells (B1 or B2) and/or erythrodermia (T4)
    • T-cell prolymphocytic leukemia (T-PLL)

NOTE: Diagnosis must be validated by the Pathology Department, National Cancer Institute (NCI).

-Patients must have measurable or evaluable disease.

NOTE: All patients with greater than 10% abnormal cluster of differentiation 4 (CD4+) homogeneous cluster of differentiation 3 (CD3) low strongly cluster of differentiation 25 (CD25+) expressing cells, or greater than 5% Szary cells/T-PLL, among the peripheral blood mononuclear cells (PBMCs) in the peripheral blood will be deemed to have evaluable disease.

  • Abnormal T cells must be cluster of differentiation 52 (CD52+) as assessed by flow cytometry or immunohistochemistry.
  • Patients must have a of greater than or equal to 2 months.
  • Patients must have been or relapsed following front line therapy for Adult T-cell Leukemia (ATL); those with cutaneous T-cell lymphoma (CTCL) or peripheral T-cell lymphoma (PTCL) who have cluster of differentiation 30 (CD30+) disease must have progressed during or after treatment with brentuximab vedotin, or are unable to receive treatment due to allergy or intolerance.
  • Patients must have recovered to less than grade 1 or to baseline from toxicity of prior chemotherapy or biologic therapy and must not have had major surgery, chemotherapy, radiation or biologic therapy within 2 weeks prior to beginning treatment. NOTE: Exceptions to this include events not considered to place the subject at unacceptable risk of participation in the opinion of the PI (e.g., alopecia).
  • Carbon monoxide diffusing capacity alveolar volume (DLCO/VA) and forced expiratory volume (FEV) 1.0 > 50% of predicted on pulmonary function tests.
  • Adequate laboratory parameters, as follows:

    • Serum creatinine of less than or equal to 1.5 x the
    • (AST) and alanine aminotransferase (ALT) \< 3 x the upper limit of normal
  • greater than or equal to 1,500/mm\^3 and greater than or equal to 100,000/mm\^3.
  • (ECOG) less than or equal to 1.
  • Patients must be able to understand and sign an Form.
  • All patients must use adequate during participation in this trial and for 4 months following completing therapy.

EXCLUSION CRITERIA:

  • Patients who have received any systemic therapy within 4 weeks prior to the start of therapy, or 12 weeks if given to treat (GVHD), with the exception of physiological replacement doses of cortisone acetate or equivalent.
  • Patients who have undergone stem cell transplantation and have required systemic treatment for GVHD (including but not limited to oral or parenteral corticosteroids, ibrutinib, and extracorporeal phototherapy) within the last 12 weeks
  • Clinical evidence of (parenchymal or meningeal) central nervous system (CNS) involvement or . In subjects suspected of having CNS disease, a magnetic resonance imaging (MRI) scan of the brain and lumbar puncture should be done to confirm.
  • Documented (HIV), active bacterial infections, active or chronic , .

    • Positive hepatitis B serology indicative of previous immunization (i.e., hepatitis B surface antigen (HBsAb) positive and hepatitis B core antibody (HBcAb) negative) or a fully resolved acute hepatitis B infection is not an exclusion criterion.
    • If hepatitis C antibody test is positive, then the patient must be tested for the presence of hepatitis C virus (HCV) by reverse transcription polymerase chain reaction (RT-PCR) and be HCV ribonucleic acid (RNA) negative

NOTE: HIV-positive patients are excluded from the study. Alemtuzumab may produce a different pattern of toxicities in patients with HIV infection; in addition, the depletion of T cells produced by alemtuzumab may have adverse effects on HIV-positive individuals.

  • Concurrent anticancer therapy (including other agents).
  • History of severe asthma or presently on chronic inhaled corticosteroid medications (patients with a history of mild asthma not requiring corticosteroid therapy are eligible).
  • Patients with smoldering and lymphomatous ATL.
  • Pregnant or nursing patients.
  • Patients who have previously received alemtuzumab are ineligible. NOTE: Patients with relapsed T-cell prolymphocytic leukemia (T-PLL) who have achieved at least a partial response to prior alemtuzumab are eligible.
  • Uncontrolled intercurrent illness including, but not limited to, ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, moderate/severe graft versus host disease, cognitive impairment, active substance abuse, or psychiatric illness/social situations that, in the view of the Investigator, would preclude safe treatment or the ability to give informed consent and limit compliance with study requirements.
Terms in these criteria, in plain language(17)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Life expectancy

The study doctor’s estimate of how long someone is likely to live. Criteria use it so that people can stay in the study long enough for it to answer its question.

Relapsed and refractory

Relapsed: the illness came back after treatment had worked. Refractory: it did not respond to treatment, or stopped responding while still on it.

ULN (upper limit of normal)

The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.

“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.

ALT and AST (liver enzymes)

Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.

Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.

Absolute neutrophil count (ANC)

The number of neutrophils, white blood cells that help fight infection, in a given amount of blood. Too few raises the risk of infection.

It is a count, not a percentage of the white cells. Limits are written in units that mean the same: ≥ 1.5 × 10⁹/L is ≥ 1,500 per mm³ (µL). Each lab has its own reference range.

Platelets

Blood cells that help blood clot. Too few raises the risk of bleeding and bruising. A usual adult range is about 150–400 × 10⁹/L (150,000–400,000 per µL); each lab has its own reference range.

ECOG performance status

A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.

0
Fully active, no restrictions.
1
Limited in strenuous activity, but walking and able to do light work, such as housework or office work.
2
Walking and able to look after yourself, but unable to work; up and about more than half of waking hours.
3
Able to look after yourself only in part; in bed or a chair more than half of waking hours.
4
Unable to look after yourself at all; in bed or a chair all day.

Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

Contraception

Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.

Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.

Corticosteroids (steroids)

Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.

Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.

GVHD (graft-versus-host disease)

After a transplant from a donor, the donor’s immune cells attack the recipient’s body, often the skin, gut or liver.

Allogeneic and autologous transplant

Stem cell (bone marrow) transplants. Allogeneic uses cells from a donor; autologous uses your own cells, collected earlier and given back.

Metastases

Cancer that has spread from where it began to other parts of the body. “Metastatic” cancer is cancer that has spread this way.

HIV

The human immunodeficiency virus, which weakens the immune system.

Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.

Hepatitis B tests

Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.

Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.

Hepatitis C tests

Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.

After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.

Investigational drug or device

A drug or device being studied in a clinical trial.

It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.

05

Study design

Phase
Phase 1
Primary purpose
Treatment
Allocation
Non-randomized
Intervention model
Sequential assignment
Masking
None (open label)
Enrollment
11 participants (actual)

Study arms

  • Experimental
    1A-Interleukin 15 (IL-15) Followed by Alemtuzumab

    IL-15 for 10 doses over two weeks followed by alemtuzumab for 4 weeks per dosing schema to determine the maximum tolerated dose (MTD)

    Biological: IL-15 plus · Biological: alemtuzumab

  • Experimental
    1B - Interleukin-15 (IL-15) Followed by Alemtuzumab at the Maximum Tolerated Dose

    IL-15 for 10 doses over two weeks followed by alemtuzumab for 4 weeks at the maximum tolerated dose (MTD)

    Biological: IL-15 plus · Biological: alemtuzumab

Interventions

  • BiologicalIL-15 plus

    Drug page: Interleukin-15

    Recombinant Human IL-15 (subcutaneous (s.c.) rhIL-15) by s.c. injection Monday-Friday over two weeks.

    Also known as: Interleukin-15

  • Biologicalalemtuzumab

    Alemtuzumab three times a week for a total of 4 weeks of alemtuzumab treatment.

    Also known as: Campath

06

What researchers measure

Primary outcomes

  1. Maximum Tolerated Dose (MTD) of Subcutaneous Recombinant Human IL-15 (s.c. rhIL-15)

    MTD is defined as the dose level at which no more than 1 of up to 6 participants experience a dose-limiting toxicity (DLT) during the first 6 weeks of treatment, and the dose below that at which at least 2 (of≤6) participants have DLT as a result of the drug. A DLT is defined as any grade 3 or 4 toxicity possibly, probably or definitely related to the rhIL-15 treatment that occurs during the first 6 weeks of treatment with some exceptions such as grade 3 or 4 lymphopenia, and grade 3 neutropenia for example.

    Time frame: 6 weeks

  2. Number of Dose-limiting Toxicities (DLTs) of Subcutaneous Recombinant Human IL-15 (s.c. rhIL-15) Administered With 3 Times Per Week Intravenous (IV) Alemtuzumab

    A DLT is defined as any grade 3 or 4 toxicity possibly, probably or definitely related to the rhIL-15 treatment that occurs during the first 6 weeks of treatment with some exceptions such as grade 3 or 4 lymphopenia, and grade 3 neutropenia for example.

    Time frame: 6 weeks

  3. Number of Participants With Serious Adverse Events Possibly, Probably, and/or Definitely Related to Subcutaneous (s.c. rhIL-15) by Grade Who Have Refractory or Relapsed Chronic and Acute Adult T-cell Leukemia (ATL)Cancer

    Here is the number of participants with serious adverse events possibly, probably, and/or definitely related to IL-15 (s.c. rhIL-15) by Grade assessed by the Common Terminology Criteria for Adverse Events (CTCAE 5.0). A serious adverse event is an adverse event or suspected adverse reaction that results in death, a life-threatening adverse drug experience, hospitalization, disruption of the ability to conduct normal life functions, congenital anomaly/birth defect or important medical events that jeopardize the patient or subject and may require medical or surgical intervention to prevent one of the previous outcomes mentioned. Grade 3 is severe, Grade 4 is life-threatening, and Grade 5 is death related to adverse event.

    Time frame: Date treatment consent signed to date off study, approximately 16 months and 14 days for level 1, 18 months and 12 days for level 2, and 14 months and 24 days for level 3.

Secondary outcomes

  1. Number of Participants With a Clinical Response

    Clinical response was assessed by the Response Evaluation Criteria in Solid Tumors (RECIST) and reported along with a 95% confidence interval. Complete response is disappearance of all target lesions. Partial response is at least a 30% decrease in the sum of the diameters of target lesions, taking as reference the baseline sum of diameters. Progressive disease is defined as at least a 20% increase in the sum of the diameters of target lesions, taking as reference the smallest sum on study. And the appearance of one or more new lesions. Stable disease is neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for PD, taking as reference the smallest sum of diameters while on study.

    Time frame: At 3 weeks of treatment and again at 6 weeks of treatment

  2. Progression Free Survival (PFS)

    PFS was measured from the date of protocol consent until death or progressive disease occurs. Response was assessed by the Response Evaluation Criteria in Solid Tumors (RECIST) and reported along with a 95% confidence interval. Progressive disease is defined as at least a 20% increase in the sum of the diameters of target lesions, taking as reference the smallest sum on study. And the appearance of one or more new lesions.

    Time frame: Restaging by computerized tomography (CT) occurred at the end of week 3 and week 6 during treatment, then every 60 days for 6 months, and every 90 days for up to 2 years after finishing treatment.

  3. Percentages of Circulating Lymphocytes (T and NK Cells) and the T-cell Subsets

    Biological effects of rhIL-15 administered with alemtuzumab on the percentages of circulating lymphocytes (T and NK cells) and the T-cell subsets naïve, central and effector memory subsets (based on expression of cluster of differentiation 52 (CD52), neural cell adhesion molecule (CD56), cluster of differentiation 4 (CD4), cluster of differentiation 8 (CD8), memory T cells (CD45RO), memory T cells (CD45RA), cluster of differentiation 28 (CD28), apoptosis antigen 1 (CD95), C-C Chemokine Receptor 4 (CD194), C-C Motif Chemokine Receptor 7 (CCR7) and L-selectin (CD62L) using flow cytometry.

    Time frame: At 6 weeks of treatment

  4. Plasma Levels of Pro-inflammatory Cytokines

    Plasma levels of pro-inflammatory cytokines using flow cytometry.

    Time frame: At 6 weeks of treatment

Other outcomes

  1. Number of Participants With Serious and/or Non-serious Adverse Events Regardless of Attribution Assessed by the Common Terminology Criteria for Adverse Events (CTCAE v5.0)

    Here is the number of participants with serious and/or non-serious adverse events regardless of attribution assessed by the Common Terminology Criteria for Adverse Events (CTCAE 5.0). A non-serious adverse event is any untoward medical occurrence. A serious adverse event is an adverse event or suspected adverse reaction that results in death, a life-threatening adverse drug experience, hospitalization, disruption of the ability to conduct normal life functions, congenital anomaly/birth defect or important medical events that jeopardize the patient or subject and may require medical or surgical intervention to prevent one of the previous outcomes mentioned.

    Time frame: Date treatment consent signed to date off study, approximately 16 months and 14 days for level 1, 18 months and 12 days for level 2, and 14 months and 24 days for level 3.

07

Results

Posted Apr 29, 2022

Participant flow

Participant flow — Overall Study
MilestoneLevel 1 - 0.5 mcg/kg/Dose of Interleukin 15 (IL-15)Level 2 - 1 mcg/kg/Dose of Interleukin-15 (IL-15) Followed by AlemtuzumabLevel 3 - 2 mcg/kg/Dose of Interleukin 15 (IL-15) Followed by Alemtuzumab
Started344
Completed333
Not completed011
Withdrew: Progressive disease011

Outcome measures

PrimaryMaximum Tolerated Dose (MTD) of Subcutaneous Recombinant Human IL-15 (s.c. rhIL-15)

MTD is defined as the dose level at which no more than 1 of up to 6 participants experience a dose-limiting toxicity (DLT) during the first 6 weeks of treatment, and the dose below that at which at least 2 (of≤6) participants have DLT as a result of the drug. A DLT is defined as any grade 3 or 4 toxicity possibly, probably or definitely related to the rhIL-15 treatment that occurs during the first 6 weeks of treatment with some exceptions such as grade 3 or 4 lymphopenia, and grade 3 neutropenia for example.

Time frame:
6 weeks
Reported as:
Number · mcg/kg/dose
Maximum Tolerated Dose (MTD) of Subcutaneous Recombinant Human IL-15 (s.c. rhIL-15)
mcg/kg/doseAll Participants
Maximum Tolerated Dose (MTD) of Subcutaneous Recombinant Human IL-15 (s.c. rhIL-15)2
PrimaryNumber of Dose-limiting Toxicities (DLTs) of Subcutaneous Recombinant Human IL-15 (s.c. rhIL-15) Administered With 3 Times Per Week Intravenous (IV) Alemtuzumab

A DLT is defined as any grade 3 or 4 toxicity possibly, probably or definitely related to the rhIL-15 treatment that occurs during the first 6 weeks of treatment with some exceptions such as grade 3 or 4 lymphopenia, and grade 3 neutropenia for example.

Time frame:
6 weeks
Reported as:
Number · toxicities
Number of Dose-limiting Toxicities (DLTs) of Subcutaneous Recombinant Human IL-15 (s.c. rhIL-15) Administered With 3 Times Per Week Intravenous (IV) Alemtuzumab
toxicitiesLevel 1 - 0.5 mcg/kg/Dose of Interleukin 15 (IL-15) Followed by AlemtuzumabLevel 2 - 1 mcg/kg/Dose of Interleukin-15 (IL-15) Followed by AlemtuzumabLevel 3 - 2 mcg/kg/Dose of Interleukin 15 (IL-15) Followed by Alemtuzumab
Possibly related100
Probably related000
Definitely related000
PrimaryNumber of Participants With Serious Adverse Events Possibly, Probably, and/or Definitely Related to Subcutaneous (s.c. rhIL-15) by Grade Who Have Refractory or Relapsed Chronic and Acute Adult T-cell Leukemia (ATL)Cancer

Here is the number of participants with serious adverse events possibly, probably, and/or definitely related to IL-15 (s.c. rhIL-15) by Grade assessed by the Common Terminology Criteria for Adverse Events (CTCAE 5.0). A serious adverse event is an adverse event or suspected adverse reaction that results in death, a life-threatening adverse drug experience, hospitalization, disruption of the ability to conduct normal life functions, congenital anomaly/birth defect or important medical events that jeopardize the patient or subject and may require medical or surgical intervention to prevent one of the previous outcomes mentioned. Grade 3 is severe, Grade 4 is life-threatening, and Grade 5 is death related to adverse event.

Time frame:
Date treatment consent signed to date off study, approximately 16 months and 14 days for level 1, 18 months and 12 days for level 2, and 14 months and 24 days for level 3.
Reported as:
Count of participants · Participants
Number of Participants With Serious Adverse Events Possibly, Probably, and/or Definitely Related to Subcutaneous (s.c. rhIL-15) by Grade Who Have Refractory or Relapsed Chronic and Acute Adult T-cell Leukemia (ATL)Cancer
ParticipantsLevel 1 - 0.5 mcg/kg/Dose of Interleukin 15 (IL-15)Level 2 - 1 mcg/kg/Dose of Interleukin-15 (IL-15) Followed by AlemtuzumabLevel 3 - 2 mcg/kg/Dose of Interleukin 15 (IL-15) Followed by Alemtuzumab
Grade 3111
Grade 4001
Grade 5000
SecondaryNumber of Participants With a Clinical Response

Clinical response was assessed by the Response Evaluation Criteria in Solid Tumors (RECIST) and reported along with a 95% confidence interval. Complete response is disappearance of all target lesions. Partial response is at least a 30% decrease in the sum of the diameters of target lesions, taking as reference the baseline sum of diameters. Progressive disease is defined as at least a 20% increase in the sum of the diameters of target lesions, taking as reference the smallest sum on study. And the appearance of one or more new lesions. Stable disease is neither sufficient shrinkage to qualify for PR nor sufficient increase to qualify for PD, taking as reference the smallest sum of diameters while on study.

Time frame:
At 3 weeks of treatment and again at 6 weeks of treatment
Reported as:
Count of participants · Participants
Number of Participants With a Clinical Response
ParticipantsLevel 1 - 0.5 mcg/kg/Dose of Interleukin 15 (IL-15) Followed by AlemtuzumabLevel 2 - 1 mcg/kg/Dose of Interleukin-15 (IL-15) Followed by AlemtuzumabLevel 3 - 2 mcg/kg/Dose of Interleukin 15 (IL-15) Followed by Alemtuzumab
Complete Response101
Partial Response011
Stable Disease111
Progressive Disease121
SecondaryProgression Free Survival (PFS)

PFS was measured from the date of protocol consent until death or progressive disease occurs. Response was assessed by the Response Evaluation Criteria in Solid Tumors (RECIST) and reported along with a 95% confidence interval. Progressive disease is defined as at least a 20% increase in the sum of the diameters of target lesions, taking as reference the smallest sum on study. And the appearance of one or more new lesions.

Time frame:
Restaging by computerized tomography (CT) occurred at the end of week 3 and week 6 during treatment, then every 60 days for 6 months, and every 90 days for up to 2 years after finishing treatment.
Reported as:
Median · Days
Progression Free Survival (PFS)
DaysLevel 1 - 0.5 mcg/kg/Dose of Interleukin 15 (IL-15) Followed by AlemtuzumabLevel 2 - 1 mcg/kg/Dose of Interleukin-15 (IL-15) Followed by AlemtuzumabLevel 3 - 2 mcg/kg/Dose of Interleukin 15 (IL-15) Followed by Alemtuzumab
Progression Free Survival (PFS)78 (42 to 84)83 (29 to 412)138 (2 to 760)
SecondaryPercentages of Circulating Lymphocytes (T and NK Cells) and the T-cell Subsets

Biological effects of rhIL-15 administered with alemtuzumab on the percentages of circulating lymphocytes (T and NK cells) and the T-cell subsets naïve, central and effector memory subsets (based on expression of cluster of differentiation 52 (CD52), neural cell adhesion molecule (CD56), cluster of differentiation 4 (CD4), cluster of differentiation 8 (CD8), memory T cells (CD45RO), memory T cells (CD45RA), cluster of differentiation 28 (CD28), apoptosis antigen 1 (CD95), C-C Chemokine Receptor 4 (CD194), C-C Motif Chemokine Receptor 7 (CCR7) and L-selectin (CD62L) using flow cytometry.

Time frame:
At 6 weeks of treatment

No measurements were reported for this outcome.

SecondaryPlasma Levels of Pro-inflammatory Cytokines

Plasma levels of pro-inflammatory cytokines using flow cytometry.

Time frame:
At 6 weeks of treatment

No measurements were reported for this outcome.

Other pre-specifiedNumber of Participants With Serious and/or Non-serious Adverse Events Regardless of Attribution Assessed by the Common Terminology Criteria for Adverse Events (CTCAE v5.0)

Here is the number of participants with serious and/or non-serious adverse events regardless of attribution assessed by the Common Terminology Criteria for Adverse Events (CTCAE 5.0). A non-serious adverse event is any untoward medical occurrence. A serious adverse event is an adverse event or suspected adverse reaction that results in death, a life-threatening adverse drug experience, hospitalization, disruption of the ability to conduct normal life functions, congenital anomaly/birth defect or important medical events that jeopardize the patient or subject and may require medical or surgical intervention to prevent one of the previous outcomes mentioned.

Time frame:
Date treatment consent signed to date off study, approximately 16 months and 14 days for level 1, 18 months and 12 days for level 2, and 14 months and 24 days for level 3.
Reported as:
Count of participants · Participants
Number of Participants With Serious and/or Non-serious Adverse Events Regardless of Attribution Assessed by the Common Terminology Criteria for Adverse Events (CTCAE v5.0)
ParticipantsLevel 1 - 0.5 mcg/kg/Dose of Interleukin 15 (IL-15)Level 2 - 1 mcg/kg/Dose of Interleukin-15 (IL-15) Followed by AlemtuzumabLevel 3 - 2 mcg/kg/Dose of Interleukin 15 (IL-15) Followed by Alemtuzumab
Number of Participants With Serious and/or Non-serious Adverse Events Regardless of Attribution Assessed by the Common Terminology Criteria for Adverse Events (CTCAE v5.0)344

Adverse events

Collected over Date treatment consent signed to date off study, approximately 16 months and 14 days for level 1, 18 months and 12 days for level 2, and 14 months and 24 days for level 3.. Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Level 1 - 0.5 mcg/kg/Dose of Interleukin 15 (IL-15) Followed by Alemtuzumab0/3 (0%)1/3 (33.3%)3/3 (100%)
Level 2 - 1 mcg/kg/Dose of Interleukin-15 (IL-15) Followed by Alemtuzumab0/4 (0%)1/4 (25%)4/4 (100%)
Level 3 - 2 mcg/kg/Dose of Interleukin 15 (IL-15) Followed by Alemtuzumab0/4 (0%)1/4 (25%)4/4 (100%)
Most frequent serious events
Most frequent serious events
EventLevel 1 - 0.5 mcg/kg/Dose of Interleukin 15 (IL-15) Followed by AlemtuzumabLevel 2 - 1 mcg/kg/Dose of Interleukin-15 (IL-15) Followed by AlemtuzumabLevel 3 - 2 mcg/kg/Dose of Interleukin 15 (IL-15) Followed by Alemtuzumab
EncephalopathyNervous system disorders1/30/40/4
DepressionPsychiatric disorders0/30/41/4
Thromboembolic eventVascular disorders0/31/41/4
Most frequent other events
Showing 10 of 66
Most frequent other events
EventLevel 1 - 0.5 mcg/kg/Dose of Interleukin 15 (IL-15) Followed by AlemtuzumabLevel 2 - 1 mcg/kg/Dose of Interleukin-15 (IL-15) Followed by AlemtuzumabLevel 3 - 2 mcg/kg/Dose of Interleukin 15 (IL-15) Followed by Alemtuzumab
ChillsGeneral disorders1/34/42/4
FeverGeneral disorders2/33/42/4
Infusion related reactionInjury, poisoning and procedural complications0/33/41/4
Lymphocyte count decreasedInvestigations2/33/41/4
Rash maculo-papularSkin and subcutaneous tissue disorders1/33/40/4
Alanine aminotransferase increasedInvestigations2/31/40/4
AnemiaBlood and lymphatic system disorders2/31/40/4
Aspartate aminotransferase increasedInvestigations2/32/40/4
HypophosphatemiaMetabolism and nutrition disorders2/32/41/4
Neutrophil count decreasedInvestigations2/32/41/4

Baseline characteristics

Age, Categorical
Age, Categorical(Participants)Level 1 - 0.5 mcg/kg/Dose of Interleukin 15 (IL-15)Level 2 - 1 mcg/kg/Dose of Interleukin-15 (IL-15) Followed by AlemtuzumabLevel 3 - 2 mcg/kg/Dose of Interleukin 15 (IL-15) Followed by AlemtuzumabTotal
<=18 years0000
Between 18 and 65 years3249
>=65 years0202
Age, Continuous
Age, Continuous(years)Level 1 - 0.5 mcg/kg/Dose of Interleukin 15 (IL-15)Level 2 - 1 mcg/kg/Dose of Interleukin-15 (IL-15) Followed by AlemtuzumabLevel 3 - 2 mcg/kg/Dose of Interleukin 15 (IL-15) Followed by AlemtuzumabTotal
Mean25.47 ± 10.7157.1 ± 14.5447.68 ± 3.3345.05 ± 16.3
Sex: Female, Male
Sex: Female, Male(Participants)Level 1 - 0.5 mcg/kg/Dose of Interleukin 15 (IL-15)Level 2 - 1 mcg/kg/Dose of Interleukin-15 (IL-15) Followed by AlemtuzumabLevel 3 - 2 mcg/kg/Dose of Interleukin 15 (IL-15) Followed by AlemtuzumabTotal
Female1102
Male2349
Ethnicity (NIH/OMB)
Ethnicity (NIH/OMB)(Participants)Level 1 - 0.5 mcg/kg/Dose of Interleukin 15 (IL-15)Level 2 - 1 mcg/kg/Dose of Interleukin-15 (IL-15) Followed by AlemtuzumabLevel 3 - 2 mcg/kg/Dose of Interleukin 15 (IL-15) Followed by AlemtuzumabTotal
Hispanic or Latino0000
Not Hispanic or Latino34411
Unknown or Not Reported0000
Race (NIH/OMB)
Race (NIH/OMB)(Participants)Level 1 - 0.5 mcg/kg/Dose of Interleukin 15 (IL-15)Level 2 - 1 mcg/kg/Dose of Interleukin-15 (IL-15) Followed by AlemtuzumabLevel 3 - 2 mcg/kg/Dose of Interleukin 15 (IL-15) Followed by AlemtuzumabTotal
American Indian or Alaska Native0000
Asian0000
Native Hawaiian or Other Pacific Islander0000
Black or African American3339
White0112
More than one race0000
Unknown or Not Reported0000
Region of Enrollment
Region of Enrollment(participants)Level 1 - 0.5 mcg/kg/Dose of Interleukin 15 (IL-15)Level 2 - 1 mcg/kg/Dose of Interleukin-15 (IL-15) Followed by AlemtuzumabLevel 3 - 2 mcg/kg/Dose of Interleukin 15 (IL-15) Followed by AlemtuzumabTotal
United States34411
08

Study locations

1 site
  • National Institutes of Health Clinical Center, 9000 Rockville Pike
    Bethesda, Maryland 20892, United States
09

References and documents

Publications

  • Dubois SP, Miljkovic MD, Fleisher TA, Pittaluga S, Hsu-Albert J, Bryant BR, Petrus MN, Perera LP, Muller JR, Shih JH, Waldmann TA, Conlon KC. Short-course IL-15 given as a continuous infusion led to a massive expansion of effective NK cells: implications for combination therapy with antitumor antibodies. J Immunother Cancer. 2021 Apr;9(4):e002193. doi: 10.1136/jitc-2020-002193. PubMed 33883258 ↗
  • Waldmann TA, Dubois S, Miljkovic MD, Conlon KC. IL-15 in the Combination Immunotherapy of Cancer. Front Immunol. 2020 May 19;11:868. doi: 10.3389/fimmu.2020.00868. eCollection 2020. PubMed 32508818 ↗

Study documents

PDFs hosted by the registry, ClinicalTrials.gov.

Individual participant data

Plan to share: Yes — All individual participant data (IPD) recorded in the medical record will be shared with intramural investigators upon request.

Supporting information: Study protocol, Statistical analysis plan, Informed consent form

Time frame: Clinical data available during the study and indefinitely.

Access criteria: Clinical data will be made available via subscription to Biomedical Translational Research Information System (BTRIS) and with the permission of the study principal investigator (PI).

10

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Ran from Jan 2017 to primary completion in Jun 2021, 52 months.

Results were first posted in Apr 2022, 10 months after primary completion.

How these figures are worked out, and which studies are left out of them.

Registered
Feb 20, 2016
First posted
Feb 24, 2016
StartActual
Jan 19, 2017
Primary completionActual
Jun 15, 2021
CompletionActual
Jun 15, 2021
Results first posted
Apr 29, 2022
Last update
Apr 29, 2022
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Apr 29, 2022, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT02689453
Responsible party
Kevin Conlon, MD (Principal Investigator, National Cancer Institute (NCI)) — Principal investigator
First posted
Feb 24, 2016
Start date
Jan 19, 2017
Primary completion
Jun 15, 2021
Completion
Jun 15, 2021
Results posted
Apr 29, 2022
Last update
Apr 29, 2022

Study contacts

Kevin Conlon, M.D.
principal investigator · National Cancer Institute (NCI)

Oversight

Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Apr 2022. You cannot join it, but the record below documents what was studied.

Follow this study

Get an email when the registry record changes — status, dates, results — or when someone posts here.

Sign in to follow

Discussion

Questions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.

Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.

Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.

Studies of the drugs tested here: Interleukin-15 · Alemtuzumab

Start the discussion