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CompletedNCT00637052Updated Feb 8, 2021

A Study of ARRY-520 in Patients With Advanced Myeloid Leukemia

A Phase 1/2 interventional study of ARRY-520, KSP(Eg5) inhibitor; intravenous in Advanced MDS and Acute Myeloid Leukemia, sponsored by Pfizer. Completed at 2 sites in United States. Open to participants aged 17 Years and older. Per ClinicalTrials.gov, last updated 2021-02-08.

Sponsored by Pfizer · Phase 1/2, Interventional, and Treatment

Phase
Phase 1/2
Study type
Interventional
Enrollment
36
Allocation
Non-randomized
Ages
17 Years and older
Sex
All
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Study summary

This is a 2-phase study during which patients with select myeloid leukemias or advanced myelodysplastic syndrome (MDS), who have failed, refused or are not eligible for standard treatment, will receive investigational study drug ARRY-520.

The study has 3 parts. The first phase of the study, Phase 1, has 2 parts. In the first part of Phase 1, patients with select myeloid leukemias or advanced MDS will receive increasing doses of study drug on different schedules in order to achieve the highest dose possible that will not cause unacceptable side effects. Approximately 30 patients (per schedule) from the US will be enrolled in Part 1 (Completed). In the second part of Phase 1, patients with advanced MDS will receive the best dose of study drug and schedule determined from the first part of the study. Approximately 10 patients from the US will be enrolled in Part 2 (Completed).

In the third part of the study, Phase 2, patients with acute myeloid leukemia (AML) or advanced MDS will receive the best dose of study drug and schedule determined from the first part of the study and will be followed to see what side effects the study drug causes and to see what effectiveness it has, if any, in treating the cancer. Approximately 40 patients from the US will be enrolled in Part 3 (Withdrawn).

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Conditions studied

  • Advanced MDS
  • Acute Myeloid Leukemia

Keywords

  • preleukemia
  • dysplasia of myeloid blood cells
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In context

Leukemia

5,441 studies on the registry are indexed under Leukemia; 636 are open to participants now.

This study's enrollment of 36 is close to the median of 38 across 4,247 interventional studies indexed under Leukemia.

Browse Leukemia studies →

Lead sponsor

Pfizer is the lead sponsor of 3,244 studies on the registry; 139 are open to participants now.

Of its 582 completed or terminated interventional studies of FDA-regulated products, 381 (65%) have results posted.

Counted across the registry records on this site, refreshed daily.

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Who can participate

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

Eligibility criteria

Key Inclusion Criteria (Part 2):

  • Patients with either Intermediate-2 or High risk MDS or with AML (>20% bone marrow blasts) with stable low or normal white blood cell count (WBC). Patients should have failed one prior chemotherapy regimen which should have included a hypomethylating agent.
  • Eastern Cooperative Oncology Group (ECOG) performance status (PS) of 0, 1 or 2.
  • Discontinuation of prior treatment at least 2 weeks prior to the start of the study.
  • Adequate hepatic and renal function.
  • Additional criteria exist.

Key Exclusion Criteria (Part 2):

  • Concurrent cytotoxic therapy, or biological, endocrine and immunological response modifiers.
  • Previous radiation to >25% of bone marrow.
  • Other active malignancies.
  • Known positive serology for the human immunodeficiency virus (HIV).
  • Central nervous system involvement as documented by spinal fluid cytology.
  • Active, uncontrolled infection.
  • Additional criteria exist
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Study design

Phase
Phase 1 / Phase 2
Primary purpose
Treatment
Allocation
Non-randomized
Intervention model
Single group
Enrollment
36 participants (actual)

Study arms

  • Experimental
    ARRY-520

    Drug: ARRY-520, KSP(Eg5) inhibitor; intravenous

Interventions

  • DrugARRY-520, KSP(Eg5) inhibitor; intravenous

    Part 1: multiple dose, escalating; Part 2: multiple dose, single schedule; Part 3: multiple dose, single schedule.

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What researchers measure

Primary outcomes

  1. Establish the maximum tolerated dose (MTD) of the study drug.

    Time frame: Part 1

  2. Characterize the pharmacokinetics (PK) of the study drug.

    Time frame: Part 1

  3. Characterize the safety profile of the study drug in terms of adverse events, dose limiting toxicity, clinical laboratory tests, weight, electrocardiograms and physical examinations.

    Time frame: Part 1 and Part 2

  4. Assess the efficacy of the study drug in terms of incidence of complete remission (CR) and hematologic improvement (CRp).

    Time frame: Part 3

Secondary outcomes

  1. Assess the efficacy of the study drug in terms of incidence of CR and CRp.

    Time frame: Part 1 and Part 2

  2. Characterize the safety profile of the study drug in terms of adverse events, dose limiting toxicity, clinical laboratory tests, weight, electrocardiograms and physical examinations.

    Time frame: Part 3

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Study locations

2 sites
  • Emory University School of Medicine, Winship Cancer Center
    Atlanta, Georgia 30322, United States
  • University of Texas, M.D. Anderson Cancer Center
    Houston, Texas 77030, United States
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References and documents

Publications

  • Khoury HJ, Garcia-Manero G, Borthakur G, Kadia T, Foudray MC, Arellano M, Langston A, Bethelmie-Bryan B, Rush S, Litwiler K, Karan S, Simmons H, Marcus AI, Ptaszynski M, Kantarjian H. A phase 1 dose-escalation study of ARRY-520, a kinesin spindle protein inhibitor, in patients with advanced myeloid leukemias. Cancer. 2012 Jul 15;118(14):3556-64. doi: 10.1002/cncr.26664. Epub 2011 Dec 2. PubMed 22139909 ↗

Individual participant data

Plan to share: Yes — Pfizer will provide access to individual de-identified participant data and related study documents (e.g. protocol, Statistical Analysis Plan (SAP), Clinical Study Report (CSR)) upon request from qualified researchers, and subject to certain criteria, conditions, and exceptions. Further details on Pfizer's data sharing criteria and process for requesting access can be found at: https://www.pfizer.com/science/clinical_trials/trial_data_and_results/data_requests.

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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Feb 8, 2021, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT00637052
Lead sponsor
Pfizer
Responsible party
Sponsor
First posted
Mar 17, 2008
Start date
Mar 18, 2008
Primary completion
Jun 21, 2010
Completion
Jun 21, 2010
Last update
Feb 8, 2021

Study contacts

Pfizer CT.gov Call Center
study director · Pfizer
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Feb 2021. You cannot join it, but the record below documents what was studied.

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