ALT-801-activated Natural Killer Cells After FLAG Induction for Acute Myeloid Leukemia

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT01478074
Recruitment Status : Withdrawn (The treatment planned was determined to be of low feasibility as no subject was found eligible and able to enroll after screening over 30 subjects)
First Posted : November 23, 2011
Last Update Posted : January 3, 2014
M.D. Anderson Cancer Center
Information provided by (Responsible Party):
Altor BioScience

Brief Summary:
This is a single-center open-label phase I clinical trial of delivering haploidentical natural killer (NK) cells matured ex vivo with ALT-801 followed by intravenous infusions of ALT-801 in patients with relapsed/refractory Acute Myeloid Leukemia (AML). The study will be conducted at M.D. Anderson Cancer Center (MDACC) and MDACC Children's Cancer Hospital in Houston, Texas.

Condition or disease Intervention/treatment Phase
Acute Myeloid Leukemia Drug: G-CSF Drug: Cytarabine Drug: Fludarabine Biological: Donor Natural Killer (NK) cells Biological: ALT-801 Phase 1

Detailed Description:

Hematopoietic stem cell transplantation (SCT) is an effective treatment for acute myeloid leukemia (AML) and myelodysplastic syndrome (MDS). For patients transplanted in first remission or with low risk MDS, approximately 60% of patients have achieved long-term disease free survival. Patients with relapsed leukemia have a poorer outcome; the long-term disease free survival rate for relapsed AML is 5-10% without hematopoietic stem cell transplantation (HSCT). With HSCT, survival after relapse approaches 40%, but success depends greatly on whether patients are in remission at the time of transplant. Many relapsed patients have refractory chemoresistant disease and never attain remission to be eligible for potentially curative HSCT, or develop significant complicating comorbidities during the prolonged intensive reinduction of their disease. Thus, improved strategies for achieving remission in relapsed patients prior to transplantation are critical to improving the survival of these patients. Relapsed/refractory AML requires remission prior to allogeneic HSCT for optimal survival, but responds poorly to chemotherapy. Human leukocyte antigen (HLA)-haploidentical, NK-enriched peripheral blood cell infusions may augment induction chemotherapy in patients with poor prognosis AML, but there are significant toxicities related to the IL-2 infusions given for optimal NK cell activity. The purpose of this trial is to estimate the toxicity and feasibility of treating relapsed/refractory AML with FLAG chemotherapy followed by haploidentical donor-derived natural killer (NK) cells using ALT-801 for ex vivo and in vivo NK cell activation as an alternative to interleukin-2 (IL-2).

ALT-801 is a genetically engineered fusion protein, that is, a single protein made by combining the DNA of two or more different genes. ALT-801 is a combination of IL-2 (an important protein for stimulating immune cells) and a binding portion that recognizes tumor cells.

The primary objective of this study is to evaluate the safety and feasibility of an infused allogeneic donor NK cell product and ALT-801 following a FLAG preparative regimen to treat relapsed/refractory acute myelogenous leukemia. The primary endpoint for toxicity is the absence of NK cell Product or ALT-801-related grade 2 toxicity, excluding grade 2 fever, rigor/chills, fatigue, vomiting/nausea, pruritus/itching, electrolyte imbalance, hypoalbuminemia or lymphopenia within 21 days of the ALT-801 or NK cell product infusion. The primary endpoint of feasibility is defined as being able to infuse NK-cells at the maximum tolerated cell dose or the highest dose level on day 0 and complete all 8 planned doses of ALT-801, with a safety that does not exceed toxicity limits, in greater than or equal to 7 of 10 subjects.

Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 0 participants
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
Official Title: A Single-center Open-label Phase I Study of ALT-801 for ex Vivo Maturation and in Vivo Retargeting of Haploidentical Natural Killer Cells Delivered Following Fludarabine, Cytarabine, and G-CSF in Patients With Relapsed/Refractory Acute Myeloid Leukemia
Study Start Date : November 2011
Estimated Primary Completion Date : October 2013
Actual Study Completion Date : November 2013

Arm Intervention/treatment
Experimental: FLAG + NK Cells + ALT-801 Drug: G-CSF
5 mcg/kg daily from day -7 until post-nadir ANC > 1000

Drug: Cytarabine
2 g/m2 daily from day -6 through -2

Drug: Fludarabine
30 mg/m2 daily from day -6 through -2

Biological: Donor Natural Killer (NK) cells
Infused once on day 0. Four cohorts of escalating doses receiving 0, 1, 10, or 20 x 10^6 cells/Kg

Biological: ALT-801
0.04 mg/kg IV thrice weekly for 8 doses beginning day +2

Primary Outcome Measures :
  1. Maximum tolerated dose of NK cells [ Time Frame: 18 months ]
    Determined by the maximum tolerated dose of NK cells that can be given in combination with ALT-801 with less than 1/3 of patients experience dose-limiting toxicities related to the NK cells or ALT-801.

  2. Safety of delivering NK cells and ALT-801 in combination with FLAG [ Time Frame: 6 months after study completes accrual ]
    Determined by whether the maximum tolerated dose of NK cells can be given in combination with ALT-801 and FLAG chemotherapy without exceeding a rate of 0.28 for >= Grade 3 toxicities (10% above that of FLAG therapy alone) during the treatment period.

Secondary Outcome Measures :
  1. Activation status of NK cells following activation with ALT-801 [ Time Frame: 6 months after study completes accrual ]
    Activation status of ALT-801-activated NK cells will be determined by measuring NK cell degranulation against standardized targets and comparing with freshly-obtained NK cells.

  2. In vivo persistence and function of haploidentical NK cells activated with ALT-801. [ Time Frame: 6 months after study completes accrual ]
    Determined by measuring levels of donor NK cells in the blood and their degranulation against standardized targets.

  3. Overall response to this regimen [ Time Frame: 6 months after study completes accrual ]
    Determined according to AML Response Criteria in NCCN Practice Guidelines for Oncology v.1.2008.

  4. Rate of stem cell transplantation and the time-to-transplantation [ Time Frame: 6 months after study completes accrual ]
    Determined by reporting how often and at what time patients achieve sufficient remission and health status to receive hematopoietic stem cell transplantation as definitive therapy after receiving this combination of chemotherapy, cellular therapy, and immune therapy.

  5. ALT-801 immunogenicity [ Time Frame: 6 months after study completes accrual ]
    Determined by measuring levels of anti-ALT-801 antibodies in serum before treatment and at the end of treatment.

Information from the National Library of Medicine

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Ages Eligible for Study:   2 Years to 59 Years   (Child, Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Recipient Inclusion Criteria:

  1. Patients with relapsed AML, including those with CNS disease or previous hematopoietic stem cell transplantation, or primary refractory AML (primary AML that has failed remission to at least two cycles of induction therapy)
  2. For patients of Cohorts 2 to 4, availability of a haploidentical family peripheral blood stem cell donor selected for best possible KIR reactivity
  3. Patient is between 2 and 59 years of age, inclusive
  4. Patient must have recovered from the treatment-related toxicities of prior cytotoxic agents received in the 4 weeks prior to beginning treatment on this protocol, with the exception of cytopenias resulting from persistent disease, and alopecia
  5. Zubrod performance scale (Refer to Appendix C) ≤ 2 or Lansky (Refer to Appendix D) > 60
  6. Adequate renal function defined as:

    • For adults serum creatinine < 2 mg/dL
    • For children serum creatinine < 2 mg/dL or < 2 times upper limit of normal (ULN) for age (which ever is less) If abnormal creatinine level, 24h creatinine clearance > 60 mL/min/1.73m^2
  7. Adequate liver function, defined as: Total bilirubin ≤ 2 mg/dL and SGPT (ALT) ≤ 2.5 x ULN for age (unless Gilbert's disease or abnormal liver function due to primary disease)
  8. Pulmonary symptoms controlled by medication and pulse oximetry> 92% room air
  9. New York Heart Association classification < III
  10. Negative serum test to rule out pregnancy within 2 weeks prior to registration in females of childbearing potential (non childbearing potential defined as premenarchal, greater than one year post-menopausal, or surgically sterilized)
  11. Sexually active males and females of childbearing potential must agree to use a form of contraception considered effective and medically acceptable by the Investigator
  12. Negative serology for human immunodeficiency virus (HIV)

Recipient Exclusion Criteria:

  1. Investigational therapies in the 4 weeks prior to beginning treatment on this protocol
  2. Congestive heart failure < 6 months prior to screening
  3. Unstable angina pectoris < 6 months prior to screening
  4. Myocardial infarction < 6 months prior to screening

Donor Inclusion Criteria:

  1. Related to recipient (sibling, parent, offspring, offspring of a sibling)
  2. HLA-haploidentical to recipient (need not be re-tested if already performed previously, provided copies of the original results are available)
  3. Able and willing to undergo apheresis
  4. Willing to donate blood for baseline chimerism assessment
  5. Negative serum test to rule out pregnancy within two weeks prior to registration in females of childbearing potential (non childbearing potential defined as premenarchal, greater than one year post-menopausal, or surgically sterilized)
  6. Donor must meet institutional eligibility criteria for allogeneic blood stem cell donation including infectious disease screening panel (Hepatitis B, Hepatitis C, HIV, CMV, and West Nile Virus) and CBC, differential and platelet studies
  7. Donor must meet stem cell donor eligibility criteria as set forth in 21 CFR 1271 subpart C
  8. The preferred Donor will be selected as the most alloreactive of the available haploidentical related donors on the basis of predicted NK cell alloreactivity using Recipient and Donor HLA type. If necessary, the best of equally alloreactive donors will be determined by Donor KIR type. NK alloreactivity is defined as o A KIR gene is present on the Donor NK cells for which

    • the HLA haplotype (KIR ligand) for the KIR receptor in question is absent in the Recipient, and
    • the HLA haplotype (KIR ligand) for the KIR receptor in question is present in the Donor

Donor Exclusion Criteria:

  1. Active infection (defined as on antimicrobial therapy and/or febrile)
  2. Pregnant females
  3. Breast-feeding females

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT01478074

United States, Texas
MD Anderson Cancer Center
Houston, Texas, United States, 77030
Sponsors and Collaborators
Altor BioScience
M.D. Anderson Cancer Center
Study Director: Hing C Wong, PhD Altor BioScience

Responsible Party: Altor BioScience Identifier: NCT01478074     History of Changes
Other Study ID Numbers: CA-ALT-801-02-08
First Posted: November 23, 2011    Key Record Dates
Last Update Posted: January 3, 2014
Last Verified: January 2014

Keywords provided by Altor BioScience:
Acute Myeloid Leukemia
Relapsed leukemia
Refractory leukemia
Natural Killer Cells
Adoptive immunotherapy
NK cell infusion
KIR mismatch

Additional relevant MeSH terms:
Leukemia, Myeloid
Leukemia, Myeloid, Acute
Neoplasms by Histologic Type
Fludarabine phosphate
Antineoplastic Agents
Antimetabolites, Antineoplastic
Molecular Mechanisms of Pharmacological Action
Immunosuppressive Agents
Immunologic Factors
Physiological Effects of Drugs
Antiviral Agents
Anti-Infective Agents
Analgesics, Non-Narcotic
Sensory System Agents
Peripheral Nervous System Agents