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A Randomized Phase II, Open-Label Study of the Efficacy and Safety of Orally Administered SAR302503 in Patients With Polycythemia Vera (PV) or Essential Thrombocythemia (ET) Who Are Resistant or Intolerant to Hydroxyurea

Phase 2
18 Years
Open (Enrolling)
Hematopoietic Neoplasm

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Trial Information

A Randomized Phase II, Open-Label Study of the Efficacy and Safety of Orally Administered SAR302503 in Patients With Polycythemia Vera (PV) or Essential Thrombocythemia (ET) Who Are Resistant or Intolerant to Hydroxyurea

The duration of the study for an individual patient is at least 40 weeks and will include a
period to assess eligibility (screening period) of up to 4 weeks (28 days), a treatment
period of up to 8, 28-day cycles (32 weeks), and a follow-up visit 30 days following the
last administration of study drug. Treatment may continue if the patient is deriving benefit
and does not experience disease progression, unacceptable toxicity, or meet other study
withdrawal criteria.

Inclusion Criteria

Inclusion criteria:

- Has had a diagnosis of hydroxyurea resistant or intolerant polycythemia vera (PV) or
essential thrombocythemia (ET).

- Polycythemia vera or essential thrombocythemia defined according to the revised WHO

- Polycythemia vera resistance or intolerance to hydroxyurea is defined as polycythemia
vera patients on hydroxyurea with a hematocrit >45%, or phlebotomy twice in the last
6 months and at least once in the last 3 months.

- Essential thrombocythemia resistance or intolerance to hydroxurea is defined as
essential thrombocythemia patients on HU with platelet count >600 x 10x9/L.

Dose Expansion Phase (polycythemia vera) and 600 mg/day group (essential thrombocythemia):

- Has had a diagnosis of polycythemia vera and essential thrombocythemia according to
the revised WHO 2008 criteria.

- PV patients must be resistant or intolerant to hydroxyurea.

- ET patients must be resistant or intolerant to hydroxyurea.

- Provide written informed consent to participate.

Exclusion criteria:

- Less than 18 years of age.

- Participation in any study of an investigational agent (drug, biologic, device)
within 30 days prior to initiation of study drug, unless during non-treatment phase.
(Prior treatment with another JAK2 inhibitor is allowed.)

- Unwilling to comply with scheduled visits, treatment plans, laboratory assessments,
and other study-related procedures.

- Eastern Cooperative Oncology Group (ECOG) performance status (PS) of 3 or 4 at study

- Splenectomy.

- Active malignancy other than polycythemia vera or essential thrombocythemia, except
adequately treated basal cell carcinoma and squamous cell carcinoma of the skin,
cervical carcinoma in situ, or other malignancies that have been stable and off
therapy for ≥5 years.

- Major surgery within 28 days or radiation within 3 months prior to initiation of
study drug.

- Active acute infection requiring antibiotics.

- Known human immunodeficiency virus or acquired immunodeficiency syndrome-related

- Uncontrolled congestive heart failure (New York Heart Association Classification 3 or
4), angina, myocardial infarction, cerebrovascular accident, coronary/peripheral
artery bypass surgery, transient ischemic attack, or pulmonary embolism within 3
months prior to initiation of study drug.

- Any severe acute or chronic medical, neurological, or psychiatric condition or
laboratory abnormality that may increase the risk associated with study participation
or study drug administration, may interfere with the informed consent process and/or
with compliance with the requirements of the study, or may interfere with
interpretation of study results and, in the Investigator's opinion, would make the
patient inappropriate for entry into this study.

- Inadequate organ function.

- Known active (acute or chronic) Hepatitis A, B, or C; and Hepatitis B and C carriers.

- Prior history of chronic liver disease (eg, chronic alcoholic liver disease,
autoimmune hepatitis, sclerosing cholangitis, primary biliary cirrhosis,
hemachromatosis, non-alcoholic steatohepatitis [NASH]).

- Concomitant treatment with or use of drugs or herbal agents known to be at least
moderate inhibitors or inducers cytochrome P450 3A4 (CYP3A4).

- Presence of any gastric or other disorder that would inhibit absorption of oral

- Known hypersensitivity to any excipients in the study drug formulation.

- Women of childbearing potential, unless using effective contraception while on study

- Men who partner with a woman of childbearing potential, unless they agree to use
effective contraception while on study drug.

The above information is not intended to contain all considerations relevant to a
patient's potential participation in a clinical trial.

Type of Study:


Study Design:

Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Treatment

Outcome Measure:

Dose Ranging Phase: Proportion of PV patients with absence of phlebotomy and hematocrit below 45% and proportion of ET patients with a platelet count ≤ 400 x 10x9/L for a minimum of 3 months during the first 8 cycles of therapy.

Outcome Time Frame:

2 years

Safety Issue:


Principal Investigator

Clinical Sciences & Operations

Investigator Role:

Study Director

Investigator Affiliation:



United States: Food and Drug Administration

Study ID:




Start Date:

October 2011

Completion Date:

April 2015

Related Keywords:

  • Hematopoietic Neoplasm
  • Neoplasms
  • Polycythemia
  • Polycythemia Vera
  • Thrombocythemia, Essential
  • Hematologic Neoplasms
  • Thrombocytosis



Investigational Site Number 840004Santa Monica, California  90403
Investigational Site Number 840001San Antonio, Texas  78229
Investigational Site Number 840005San Francisco, California  94117
Investigational Site Number 840008Scottsdale, Arizona  85259-5499
Investigational Site Number 840011Palo Alto, California  94301
Investigational Site Number 840010Ann Arbor, Michigan  48109
Investigational Site Number 840007Rochester, Minnesota  55905
Investigational Site Number 840003St Louis, Missouri  63110
Investigational Site Number 840006Newark, New Jersey  07112
Investigational Site Number 840009Charleston, South Carolina  29425