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Hematopoietic NeoplasmPhase 2JAKARTA2NCT01523171

Phase II, Open Label, Single Arm Study of SAR302503 In Myelofibrosis Patients Previously Treated With Ruxolitinib

A Phase 2 study testing SAR302503 in people with Hematopoietic Neoplasm, run by Bristol-Myers Squibb at 42 sites in 10 countries.

Terminated

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

Official record
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Trial summary

Primary Objective: To evaluate the efficacy of once daily dose of SAR302503 in subjects previously treated with ruxolitinib and with a current diagnosis of intermediate-1 with symptoms, Intermediate-2 or high-risk primary myelofibrosis (PMF), post-polycythemia vera myelofibrosis (Post-PV MF), or post-essential… Read more about this study

Who is it for?
Ages 18 years and older
Conditions the study is for
Hematopoietic Neoplasm
What is being tested?
SAR302503
Type of treatment
Pill or oral medicine
Could I receive a placebo?
No, everyone receives an active treatment
How many people
97 participants
Where
42 sitesin 10 countries
Study dates
30 Apr 2012to 30 Apr 2014
Phase
Phase 2
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 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Diagnosis of PMF or Post-PV MF or Post-ET MF, according to the 2008 World Health Organization and IWG-MRT response criteria
  • Subjects who previously received Ruxolitinib treatment for PMF or Post-PV MF or Post-ET MF or PV or ET for at least 14 days (exposure of <14 days is allowed for subjects who discontinued Ruxolitinib due to intolerability or allergy) and discontinued the treatment for at least 14 days prior to the first dose of SAR302503
  • MF classified as Intermediate-1 with symptoms, Intermediate-2 or high-risk by Dynamic International Prognostic Scoring System (Passamonti et al., Blood 2010)
  • Spleen ≥5 cm below costal margin as measured by palpation
  • Male and female subjects ≥18 years of age
  • Signed written informed consent

Who cannot join

  • Splenectomy
  • Eastern Cooperative Oncology Group (ECOG) performance status of >2 before the first dose of SAR302503 at Cycle 1 Day1
  • The following laboratory values within 14 days prior to the initiation of SAR302503:
  • Absolute Neutrophil Count (ANC) <1.0 x 10exp9/L
  • Platelet count <50 x 10exp9/L
  • Serum creatinine >1.5 x Upper limit of normal (ULN)
Show all 16Show fewer
  • Serum amylase and lipase >1.5 x ULN
  • Aspartate aminotransferase (AST) or alanine aminotransferase (ALT) ≥2.5 x ULN
  • Total bilirubin ≥3.0 x ULN
  • Subjects with total bilirubin between 1.5-3.0 x ULN must be excluded if the direct bilirubin fraction is ≥25% of the total
  • Subjects with 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])
  • Subjects with any other prior malignancies are not eligible, except for the following: adequately treated basal cell or squamous cell skin cancer, in situ cervical cancer, or other cancer from which subject has been disease-free for at least 5 years
  • Any chemotherapy, immunomodulatory drug therapy (eg, thalidomide, interferon-alpha), Anagrelide, immunosuppressive therapy, corticosteroids >10 mg/day prednisone or equivalent, or growth factor treatment (eg, erythropoietin), or hormones (eg, androgens, danazol) within 14 days prior to initiation of SAR302503; darbepoetin use within 28 days prior to initiation of SAR302503.The only chemotherapy allowed will be hydroxyurea within 1 day prior to initiation of SAR302503
  • Uncontrolled congestive heart failure (New York Heart Association Classification 3 or 4), angina, myocardial infarction, cerebrovascular accident, coronary/peripheral artery bypass graft surgery, transient ischemic attack, or pulmonary embolism within 3 months prior to initiation of SAR302503
  • The above information is not intended to contain all considerations relevant to a patient's potential participation in a clinical trial.

Trial locations and contacts

42 sites in 10 countries.

42 sites in 10 countries

United States16 sites
  • Investigational Site Number 840010

    Ann Arbor, Michigan, 48109-0759

  • Investigational Site Number 840005

    Atlanta, Georgia, 30322

  • Investigational Site Number 840017

    Baltimore, Maryland, 21201

  • Investigational Site Number 840013

    Baltimore, Maryland, 21229

  • Investigational Site Number 840024

    Charleston, South Carolina, 29406

  • Investigational Site Number 840014

    Chicago, Illinois, 60637

  • Investigational Site Number 840022

    Cleveland, Ohio, 44195

  • Investigational Site Number 840002

    Houston, Texas, 77030

  • Investigational Site Number 840001

    Kansas City, Kansas, 66160-7321

  • Investigational Site Number 840019

    Middletown, Ohio, 45042

  • Investigational Site Number 840009

    New York, New York, 10021

  • Investigational Site Number 840018

    New York, New York, 10032

  • Investigational Site Number 840007

    Phoenix, Arizona, 85054

  • Investigational Site Number 840015

    Salt Lake City, Utah, 84112-5550

  • Investigational Site Number 840003

    San Francisco, California, 94143

  • Investigational Site Number 840004

    San Francisco, California, 94143

Other trials in United States

France5 sites
  • Investigational Site Number 250001

    Marseille, 13273

  • Investigational Site Number 250003

    Nîmes, 30029

  • Investigational Site Number 250002

    Paris, 75475

  • Investigational Site Number 250006

    Paris, 75571

  • Investigational Site Number 250004

    Toulouse, 31000

Other trials in France

Germany5 sites
  • Investigational Site Number 276003

    Frankfurt am Main, 60590

  • Investigational Site Number 276007

    Leipzig, 04103

  • Investigational Site Number 276006

    Magdeburg, 39120

  • Investigational Site Number 276001

    Mannheim, 68167

  • Investigational Site Number 276005

    Ulm, 89081

Other trials in Germany

Italy4 sites
  • Investigational Site Number 380004

    Florence, 50134

  • Investigational Site Number 380001

    Milan, 20122

  • Investigational Site Number 380002

    Roma, 00161

  • Investigational Site Number 380003

    Varese, 21100

Other trials in Italy

Netherlands3 sites
  • Investigational Site Number 528002

    Amsterdam, 1081 HV

  • Investigational Site Number 528003

    Maastricht, 6229 HX

  • Investigational Site Number 528001

    Nijmegen, 6525 GA

Other trials in Netherlands

Spain3 sites
  • Investigational Site Number 724001

    Barcelona, 08036

  • Investigational Site Number 724003

    Majadahonda, 28222

  • Investigational Site Number 724002

    Salamanca, 37007

Other trials in Spain

Austria2 sites
  • Investigational Site Number 040002

    Salzburg, 5020

  • Investigational Site Number 040001

    Vienna, 1090

Other trials in Austria

Belgium2 sites
  • Investigational Site Number 056002

    Antwerp, 2060

  • Investigational Site Number 056003

    Leuven, 3000

Other trials in Belgium

Canada1 site
  • Investigational Site Number 124001

    Toronto, M5G 2M9

Other trials in Canada

United Kingdom1 site
  • Investigational Site Number 826001

    London, SE1 9RT

Other trials in United Kingdom

About this study

Official title: A Phase II, Multicenter, Open Label, Single Arm Study of SAR302503 in Subjects Previously Treated With Ruxolitinib and With a Current Diagnosis of Intermediate or High-Risk Primary Myelofibrosis, Post-Polycythemia Vera Myelofibrosis, or Post-Essential Thrombocythemia Myelofibrosis

Primary Objective:

  • To evaluate the efficacy of once daily dose of SAR302503 in subjects previously treated with ruxolitinib and with a current diagnosis of intermediate-1 with symptoms, Intermediate-2 or high-risk primary myelofibrosis (PMF), post-polycythemia vera myelofibrosis (Post-PV MF), or post-essential thrombocythemia myelofibrosis (Post-ET MF) based on the reduction of spleen volume at the end of 6 treatment cycles;
Read more

Secondary Objectives:

  • To evaluate the effect of SAR302503 on Myelofibrosis (MF) associated symptoms as measured by the modified Myelofibrosis Symptom Assessment Form (MFSAF) diary
  • To evaluate the durability of splenic response
  • To evaluate the splenic response to SAR302503 by palpation at the end of Cycle 6
  • To evaluate the splenic response to SAR302503 at the end of Cycle 3
  • To evaluate the effect of SAR302503 on the Janus kinase 2 (JAK2) V617F allele burden
  • To evaluate the safety and tolerability of SAR302503 in this population
  • To evaluate plasma concentrations of SAR302503 for population PK analysis, if warranted
Read the detailed description

The expected duration of the treatment in this study is approximately 8 months, based on a maximum 28-day screening period, followed by a 6-month (6-cycle) treatment period, and an EOT visit for subjects who will not continue the treatment after completing the 6 cycles of SAR302503, or discontinue the treatment early for any reasons as well as a follow-up visit which should occur 30 days after the last administration of SAR302503. Patients who continue to benefit clinically will be allowed to remain on study medication beyond the 6-month treatment period until the occurrence of disease progression or unacceptable toxicity.

Being tested
SAR302503
Medical subject headings
Hematologic Neoplasms

What participants receive

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

  • SAR302503Drug

    Pharmaceutical form:capsule

    Route of administration: oral

Study groups in NCT01523171
Study groupRoleWhat they receive
SAR302503 400 mgExperimentalonce daily in consecutive 28-day cycles, flexible dosing regimen (the starting dose is 400mg/day), orally, empty stomach, approximately same time each day
Receives: Drug: SAR302503

What is being measured

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

  1. Response Rate: Percentage of Participants With >=35% Reduction From Baseline in Spleen Volume at End of Cycle 6

    Spleen volume was measured by central imaging MRI (CT scan in participants with contraindications for MRI). Analysis was performed on Per Protocol (PP) population defined as all treated participants with a baseline and at least one post-baseline MRI/CT scan of spleen volume, and had no important protocol deviations that could impact on efficacy outcome. Last observation carried forward (LOCF) method was used to impute the missing data.

    Measured: Baseline, End of Cycle 6

Secondary outcomes (5)
  1. Symptom Response Rate: Percentage of Participants With >=50% Reduction From Baseline in the Total Symptom Score Using MFSAF at End of Cycle 6

    The key MF-associated symptoms were assessed using the modified Myelofibrosis Symptom Assessment Form (MFSAF) Diary: night sweats, pruritus, abdominal discomfort, early satiety, pain under ribs on left side, and bone or muscle pain. These were measured on a scale from 0 (absent) to 10 (worst imaginable). Then Total symptom score (range 0 to 60) was defined as the sum of the scores for each of the 6 symptoms of MFSAF. Higher score indicated greater severity of symptoms. Analysis was performed on MFSAF analysis population defined as all treated participants with baseline and at least 1 post-baseline evaluable assessment of total symptom score.

    Measured: Baseline, End of Cycle 6

  2. Percentage of Participants With a ≥50% Reduction From Baseline in Length of Spleen by Palpation at End of Cycle 6

    Percentage of Participants with a ≥50% Reduction From Baseline in Length of Spleen by Palpation at End of Cycle 6.

    Measured: Baseline, End of Cycle 6

  3. Response Rate: Percentage of Participants With ≥35% Reduction From Baseline in Spleen Volume Measured by MRI or CT Scan at End of Cycle 3

    Percentage of Participants With ≥35% Reduction From Baseline in Spleen Volume Measured by MRI or CT Scan at End of Cycle 3. Analysis was performed on PP population.

    Measured: Baseline, End of Cycle 3

  4. Percent Change From Baseline in Spleen Volume Measured by MRI or CT Scan at End of Cycle 3 and Cycle 6.

    Percent Change From Baseline in Spleen Volume Measured by MRI or CT Scan at End of Cycle 3 and Cycle 6. Analysis was performed on PP population.

    Measured: Baseline, End of Cycle 3, 6

  5. Plasma Concentration of Fedratinib

    Analysis was performed on pharmacokinetic population defined as all participants who received at least 1 (even partial) cycle of study treatment and had evaluable drug concentration data.

    Measured: Pre-dose (Hour 0), 0.5, 2.5 hours post-dose on Day 1 of Cycle 1, 2, pre-dose (Hour 0) on Day 1 of Cycle 4

Timeline

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

  1. First posted1 Feb 2012 (estimated)
  2. Study start30 Apr 2012
  3. Primary completion30 Apr 2014
  4. Study completion30 Apr 2014

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 2
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrolment
97 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT01523171
Sponsor's protocol ID
ARD12181
Other IDs
2011-005226-21, U1111-1124-0967
Acronym
JAKARTA2
Status last verified
Jun 2026
First submitted
27 Jan 2012
Last updated
16 Jul 2026
Data monitoring committee
No

Publications

  • Harrison CN, Schaap N, Vannucchi AM, Kiladjian JJ, Tiu RV, Zachee P, Jourdan E, Winton E, Silver RT, Schouten HC, Passamonti F, Zweegman S, Talpaz M, Lager J, Shun Z, Mesa RA. Janus kinase-2 inhibitor fedratinib in patients with myelofibrosis previously treated with ruxolitinib (JAKARTA-2): a single-arm, open-label, non-randomised, phase 2, multicentre study. Lancet Haematol. 2017 Jul;4(7):e317-e324. doi: 10.1016/S2352-3026(17)30088-1. Epub 2017 Jun 8.

    PubMed 28602585

Questions about this trial

What is this clinical trial studying?

A Phase 2 study testing SAR302503 in people with Hematopoietic Neoplasm, run by Bristol-Myers Squibb at 42 sites in 10 countries.

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 6 inclusion and 16 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 16 Jul 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 42 sites in United States, France, Germany, Italy, Netherlands and 5 more countries. 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 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

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 16 Jul 2026). 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?

Response Rate: Percentage of Participants With >=35% Reduction From Baseline in Spleen Volume at End of Cycle 6 (time frame: Baseline, End of Cycle 6). It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT01523171, which also lists 1 linked publication.

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 16 Jul 2026.

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