Clofarabine, Cytarabine, and Filgrastim Followed by Infusion of Non-human Leukocyte Antigen (HLA) Matched Ex Vivo Expanded Cord Blood Progenitors in Treating Patients With Acute Myeloid Leukemia

2014-08-27 03:17:18 | BioPortfolio


RATIONALE: The combination of clofarabine, cytarabine (Ara-C) and granulocyte colony-stimulating factor (G-CSF) has been tested in earlier studies for the treatment of acute myeloid leukemia. In these previous clinical trials, this combination of drugs has been shown to have an anti-leukemia effect. However, the combination of clofarabine and Ara-C is profoundly myelosuppressive and immunosuppressive causing periods of neutropenia potentially lasting more than three weeks. During this period, patients are at increased risk of infections that can result in an increased risk of death. G-CSF is a growth factor that is used to help the white blood cells recover more quickly, but even with G-CSF, the use of clofarabine and Ara-C is often limited by the need to take long breaks between treatments to allow blood counts to recover. In our lab we have developed a method of growing or "expanding" blood stem cells (cells that give rise to the blood system) from umbilical cord blood. We are doing this study to find out if giving these expanded cells after chemotherapy is safe, helps the blood system recover more quickly from chemotherapy to allow shorter breaks between treatments, and decreases the risk of infection.

PURPOSE: This phase I trial is studying the safety and potential efficacy of infusing non-HLA matched ex vivo expanded cord blood progenitors following treatment with clofarabine and cytarabine for patients with AML.



I. Assess the safety of infusing off-the-shelf non-HLA matched expanded cord blood cells following administration of GCLAC for patients with AML.


I. Assess the ability of the product to provide temporary myeloid engraftment.

II. Assess the kinetics/persistence of potential engraftment.

III. Assess the kinetics of autologous recovery when compared to historical cohorts.

IV. Assess the development of alloimmunization.


INDUCTION THERAPY: Patients receive clofarabine IV over 1 hour and cytarabine hydrochloride IV over 2 hours on days 1-5. Patients receive an infusion of non-HLA matched ex vivo expanded cord blood progenitors on day 6. Filgrastim (G-CSF) is administered subcutaneously (SC) on days 0-5 and from day 7 until blood counts recover. Treatment modifications may apply according to response.

CONSOLIDATION THERAPY: Patients receive clofarabine IV over 1 hour and cytarabine hydrochloride IV over 2 hours on days 1-5. Patients also receive G-CSF SC beginning on day 0 and continuing until blood counts recover.

Patients may receive treatment for 1-4 courses in the absence of disease progression or unacceptable toxicity.

After completion of study treatment, patients are followed periodically for 3 years.

Study Design

Allocation: Non-Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Treatment


Leukemia, Myeloid


cytarabine, filgrastim, Ex-vivo umbilical cord blood expansion, Ex-vivo umbilical cord blood progenitor infusion, DNA analysis, bone marrow aspiration, cytogenetic analysis, flow cytometry, fluorescence in situ hybridization, laboratory biomarker analysis


Fred Hutchinson Cancer Research Center
United States




Fred Hutchinson Cancer Research Center

Results (where available)

View Results


Published on BioPortfolio: 2014-08-27T03:17:18-0400

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Medical and Biotech [MESH] Definitions

Blood of the fetus. Exchange of nutrients and waste between the fetal and maternal blood occurs via the PLACENTA. The cord blood is blood contained in the umbilical vessels (UMBILICAL CORD) at the time of delivery.

Venous vessels in the umbilical cord. They carry oxygenated, nutrient-rich blood from the mother to the FETUS via the PLACENTA. In humans, there is normally one umbilical vein.

Specialized arterial vessels in the umbilical cord. They carry waste and deoxygenated blood from the FETUS to the mother via the PLACENTA. In humans, there are usually two umbilical arteries but sometimes one.

Immunosuppression by reduction of circulating lymphocytes or by T-cell depletion of bone marrow. The former may be accomplished in vivo by thoracic duct drainage or administration of antilymphocyte serum. The latter is performed ex vivo on bone marrow before its transplantation.

Transplantation of STEM CELLS collected from the fetal blood remaining in the UMBILICAL CORD and the PLACENTA after delivery. Included are the HEMATOPOIETIC STEM CELLS.

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