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Relapsed Acute Lymphoblastic LeukemiaPhase 1NCT01743807

Phase I Study of GNKG168 in Acute Lymphoblastic Leukemia and Acute Myelogenous Leukemia

A Phase 1 study testing GNKG168 in people with Relapsed Acute Lymphoblastic Leukemia and Relapsed Acute Myelogenous Leukemia, run by Therapeutic Advances in Childhood Leukemia Consortium at 3 sites in United States.

Terminated

Stopped early. The study ended before it was planned to and will not resume.

Official record
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Trial summary

This is a phase I trial of an investigational drug called GNKG168 in patients with relapsed and refractory acute lymphoblastic leukemia (ALL) and acute myelogenous leukemia (AML) who are in morphologic remission but are positive for Minimum Residual Disease (MRD). Read more about this study

Who is it for?
Ages 1 year to 21 years
What is being tested?
GNKG168
Type of treatment
Injection or infusion
Could I receive a placebo?
No, everyone receives an active treatment
How many people
4 participants
Where
3 sitesUnited States
Study dates
26 Mar 2014to 28 Jul 2014
Phase
Phase 1
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 1 year to 21 years
  • All sexes
  • No healthy volunteers
  • Child, Adult

Who may be able to join

  • Age Patients must be ≥1 and ≤ 21 years of age when originally diagnosed with ALL or AML.
  • Diagnosis
  • Patients must have previously histologically confirmed ALL or AML at original diagnosis or previous relapse. Patients with treatment-related AML are eligible.
  • Patients must be in complete remission (CR) with less than 5% blasts in the bone marrow.
  • Post-HSCT patients should be in first or greater CR
  • Patients who have never received HSCT should be in second or greater CR
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  • Patient must have detectable MRD (≥0.01%) by flow cytometry.
  • Performance Level Karnofsky ≥ 50% for patients >16 years of age and Lansky ≥ 50% for patients ≤16 years of age.
  • Prior Therapy
  • Patients must have fully recovered from the acute toxic effects of all prior anti-cancer therapy.
  • At least 14 days must have elapsed since any treatment with systemic chemotherapy including high-dose steroid (prednisone>0.5 mg/kg or equivalent), radiotherapy, biological therapy or any other investigational therapy. (Note: low-dose steroid; prednisone ≤0.5 mg/kg/day or equivalent is allowed.)
  • At least 28 days must have elapsed since any cellular therapies such as chimeric antigen receptor-modified T cells.
  • Patients who have never had HSCT must not be a suitable candidate for HSCT. For this protocol, a suitable candidate is defined as one who has an identified donor with plans to undergo transplant within the next 28 days.
  • Previous HSCT:
  • Patients having received HSCT are eligible and 60 days must have elapsed since stem cell infusion.
  • Patients having received donor lymphocyte infusions (DLI) are eligible.
  • At least 28 days must have elapsed from the last DLI.
  • Must have ≥90% donor chimerism. The test for donor chimerism must have been done within the last 60 days. If patient has subsequently relapsed after HSCT but prior to enrollment on this study, the donor chimerism test is not needed.
  • Patients must have been off all immune suppression drugs for 7 days before study entry. (at least 2 weeks for high-dose steroid, i.e. prednisone>0.5 mg/kg or equivalent; see 4b above) (Note; low-dose steroid; prednisone ≤0.5 mg/kg/day or equivalent is allowed.)
  • Renal and Hepatic Function
  • Patients must have a serum creatinine that is less than or equal to 1.5 x the institutional upper limit of normal according to age. (Grade 1 per the CTCAE 4.0)
  • Patient's ALT and AST must be less than or equal to 3 x institutional upper limit of normal. (Grade 1 per the CTCAE 4.0)
  • Patient's total bilirubin must be less than or equal to 1.5 x institutional upper limit of normal. (Grade 1 per the CTCAE 4.0)
  • Cardiac Function Patient must have a shortening fraction > 27% by ECHO or an ejection fraction > 45% by MUGA.
  • Reproductive Function
  • Female patients of childbearing potential must have a negative urine or serum pregnancy test confirmed prior to enrollment.
  • Female patients with infants must agree not to breastfeed their infants while on this study.
  • Male and female patients of child-bearing potential must agree to use an effective method of contraception approved by the investigator during the study.
  • Hematological Function Patients must have an absolute neutrophil count > 750/dL, platelets > 75,000/dL AND absolute lymphocyte count > 200/uL which is not decreasing. Patients with previous HSCT may have a platelet count > 50,000/dL.

Who cannot join

  • Patients will be excluded if they meet any of the following criteria.
  • Graft versus host disease (GVHD) that meets the following criteria:
  • Active grade 2 or higher acute GVHD at the time of study entry.
  • Active chronic GVHD (moderate or severe).
  • Plan for donor lymphocyte infusions during the study period.
  • Need for immunosuppressive medications including high-dose corticosteroids (prednisone >0.5 mg/kg or equivalent) (Note: low-dose steroid; prednisone ≤0.5 mg/kg/day or equivalent is allowed.)
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  • Patients with a systemic fungal, bacterial, viral, or other infection not controlled (defined as exhibiting ongoing signs/symptoms related to the infection and without improvement, despite appropriate antibiotics or other treatment).
  • Patient will be excluded if they are currently receiving other investigational drugs.
  • Patients will be excluded if there is a plan to administer non-protocol chemotherapy, radiation therapy, or immunotherapy during the study period.
  • Patients will be excluded if they have significant concurrent disease, illness, psychiatric disorder or social issue that would compromise patient safety or compliance with the prescribed protocol therapy, interfere with consent, study participation, follow up, or interpretation of study results.
  • Patients with CNS 3 disease are excluded. No CNS therapy will be allowed during the first 2 courses of therapy.

Trial locations and contacts

3 sites in 1 country.

United States3 sites
  • Johns Hopkins University

    Baltimore, Maryland, 21231

  • Childrens Hospital Los Angeles

    Los Angeles, California, 90027

  • Children's Hospital of Philadelphia

    Philadelphia, Pennsylvania, 19104

Other trials in United States

About this study

Official title: A Phase I Study of GNKG168 in Pediatric Patients With Acute Lymphoblastic Leukemia or Acute Myeloid Leukemia (IND#113600)

This is a phase I trial of an investigational drug called GNKG168 in patients with relapsed and refractory acute lymphoblastic leukemia (ALL) and acute myelogenous leukemia (AML) who are in morphologic remission but are positive for Minimum Residual Disease (MRD).

Read the detailed description

GNKG168 is a Toll-like receptor (TLR) agonist. TLR agonists are a novel approach to stimulate an effective anti-tumor immune response as they are able to stimulate both innate and adaptive immune responses. There will be two strata i.e patients who have received hematopoietic stem cell transplant (HSCT) and patients who have never undergone HSCT. GNKG168 will be administered as a 60 min iv infusion. One 14-day cycle consists of 5-day treatment followed by 9 day-rest. Patients will receive 2 cycles before evaluation. The primary objective is to determine the maximum tolerated dose of GNKG168 in relapsed ALL and AML patients. The completion of this study and the correlative studies will provide a solid foundation for subsequent phase 2 study and the development of clinical applications of CpG-ODN-based immune therapy as a treatment of childhood leukemia. If safety and efficacy of GNKG168 is proven, it will be intriguing to explore its role to maintain CR in a randomized manner.

Being tested
GNKG168
Keywords
Relapsed, Minimal Residual Disease, MRD, Acute Lymphoblastic Leukemia, Acute Myelogenous Leukemia, ALL, AML, GNKG168, Pediatric, Childhood
Medical subject headings
Precursor Cell Lymphoblastic Leukemia-Lymphoma, Leukemia, Myeloid, Acute, Recurrence, Neoplasm, Residual

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • GNKG168Drug

    Also called CpG685

    GNKG168 will be given intravenously over 1 hour on days 1 through 5 followed by 9 days of rest. Dose will be assigned at study entry.

    Dose Level 0: 0.15 mg/kg Dose Level 1: 0.25 mg/kg Dose Level 2: 0.75 mg/kg Dose Level 3: 1.5 mg/kg

    The starting dose level for the trial will be 0.25 mg/kg. If that dose level proves to be intolerable, the dose will be reduced to 0.15 mg/kg (dose level 0). If the 0.15 mg/kg dose level is intolerable due to DLTs, TACL, the Principal Investigator, and Medical Monitor will then decide the best course of action for subsequent administration of GNKG168.

Study groups in NCT01743807
Study groupRoleWhat they receive
Post-HSCTExperimentalPatients who have a history of hematopoetic stem cell transplantation (HSCT). GNKG168 will be administered as a 60 minute intravenous infusion daily for 5 consecutive days. It may be repeated every 14 days. Patients should receive minimum 2 courses and up to 6 courses may be administered. Dose will be assigned at study entry.
Receives: Drug: GNKG168
No HSCTExperimentalPatients who have never undergone HSCT. GNKG168 will be administered as a 60 minute intravenous infusion daily for 5 consecutive days. It may be repeated every 14 days. Patients should receive minimum 2 courses and up to 6 courses may be administered. Dose will be assigned at study entry.
Receives: Drug: GNKG168

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Number of Patients With Dose Limiting Toxicity (DLT) in the First Two Courses of Therapy

    DLT is defined as:

    1. Any non-hematologic toxicity that is ≥ CTCAE grade 3 and at least possibly related to GNKG168 (the relationship to GNKG168 cannot be ruled out), with the EXCEPTION of the following toxicities when observed at Grade 3:
    • Fatigue
    • Fever
    • Anorexia
    • Rash that turns to grade ≤ 2 within 7 days
    • Elevation in hepatic transaminases (ALT/SGOT and AST/SGPT), GGT or alkaline phosphatase that returns to ≤ grade 2 within 14 days. It will not be considered a DLT if the patient exits the study and begins alternative therapy before the end of the 14 day evaluation period.
    1. Grade 3 or 4 hematologic toxicity that is at least possibly related to GNKG168 that does not reverse to baseline within 7 days.
    2. For patients who have undergone HSCT, DLT will include the onset of Grade 3 or 4 acute GVHD, the onset of moderate to severe chronic GVHD, the onset of bronchiolitis obliterans and graft failure.

    Measured: Beginning with the first dose of GNKG168 until the end of course 2; courses are 14 days so there will be approximately 28 days of monitoring for DLT

Secondary outcomes (5)
  1. The Number of Participants With a Decrease in Minimal Residual Disease (MRD) Present in Patients Treated With GNKG168

    Doctors have developed a test to detect very small amounts of leukemia that still exist even though it looks like remission under a microscope. This test is called Minimal Residual Disease (MRD). MRD is very specific and can detect 1 cancer cell out of 10,000 regular cells. The results of the MRD test on bone marrow can show when a patient has a very small amount of cancer cells left in the bone marrow. We will use this test to evaluate the effect of GNKG168 in killing the small amount of cells left in your bone marrow.

    Measured: Pre-study and End of Course 1 (Day 14)

  2. Occurrence of Graft Versus Host Disease (GVHD) in Patients Who Had Previous HSCT and Received GNKG168

    We will evaluate the impact of GNKG168 on induction of clinical GVHD using the consensus scoring system developed by NIH (Filipovich et. al., National Institutes of Health Consensus Development Project on Criteria for Clinical Trials in Chronic Graft-versus-Host Disease: I. Diagnosis and Staging Working Group Report, Biology of Blood and Marrow Transplantation, Volume 11, Issue 12, Dec. 2005, pp. 945-956)

    Measured: Weekly during Courses 1 and 2 (i.e, 4 times in 28 days), Day 1 of Courses 3-6 (approximately Days 29, 43 and 57), and when patient is removed from protocol therapy.

  3. Occurrence of Graft Failure in Patients Who Previously Had a HSCT and Received GNKG168

    Peripheral blood samples will be evaluated for the presence of cGVHD biomarkers. Change in level of MRD, and MRD response following GNKG168

    Measured: Day 14

  4. Change in the Percent of ALL or AML Blasts Exhibiting Markers of Immunogenicity and Apoptosis

    Change in the percent of ALL or AML blasts exhibiting markers of immunogenicity and apoptosis will be analyzed from bone marrow specimens.

    Measured: End of Course 1 (Day 14), end of Course 2 (approx. Day 28), end of courses 4 and 6 (approx. Days 56 and 70), and date removed from therapy if previous marrow sample > 2 weeks ago

  5. Duration of of Remission in Patients Who Receive GNKG168

    • MRD negative Complete Remission : Negative MRD (<0.01%), no evidence of circulating leukemic blasts or extramedullary disease, and recovery of peripheral counts (ANC ≥ 500/µL and PLT count ≥ 50,000 µL).
    • MRD negative Complete Remission without platelet recovery: Insufficient recovery of platelets (< 50,000/ µL) but otherwise meets the criteria of MRD-CR.
    • Stable Disease: Patient does not satisfy the criterion for PD, or has recovery of ANC ≥ 500/µL and fails to qualify for MRD-CR or MRD-CRp.
    • Progressive Disease: At least 5% of circulating leukemic cells or ≥5% in a marrow with count recovery, development of new sites of extramedullary disease, or other laboratory or clinical evidence of PD, with or without recovery of ANC or platelets.
    • Not evaluable: Patient does not satisfy the criterion for PD, and did not have a marrow evaluation, had inadequate marrow cell count, or had insufficient recovery of ANC for MRD-CR, MRD-CRp or SD classification.

    Measured: Until patient is no longer being followed (off study)

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted6 Dec 2012 (estimated)
  2. Study start26 Mar 2014
  3. Primary completion28 Jul 2014
  4. Study completion28 Jul 2014

Why it stopped: SBI Biotech (supplier) decided to no longer support the study or GNKG168.

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 1
Primary purpose
Treatment
Allocation
Non-randomised
Intervention model
Single group
Masking
None (open label)
Enrolment
4 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT01743807
Sponsor's protocol ID
T2009-008
Status last verified
Dec 2024
First submitted
28 Nov 2012
Last updated
27 Jan 2025
Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No

Questions about this trial

What is this clinical trial studying?

A Phase 1 study testing GNKG168 in people with Relapsed Acute Lymphoblastic Leukemia and Relapsed Acute Myelogenous Leukemia, run by Therapeutic Advances in Childhood Leukemia Consortium at 3 sites in United States.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 29 inclusion and 11 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: stopped early, as of the sponsor's last update on 27 Jan 2025. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 3 sites in United States. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

Yes. Results are posted in the registry (first posted 27 Jan 2025). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Number of Patients With Dose Limiting Toxicity (DLT) in the First Two Courses of Therapy (time frame: Beginning with the first dose of GNKG168 until the end of course 2; courses are 14 days so there will be approximately 28 days of monitoring for DLT). It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 27 Jan 2025.

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