Clinical trial Recruiting at 10 sites Observational Ages 18 and up

Analyzing the Clonality Profile in Myeloproliferative Neoplasms and Thrombotic Risks

Official title: Determination of the Clonality Profile in Myeloproliferative Neoplasms and Association With the Thrombotic Complications (CLOJAK)

Run by University Hospital, Bordeaux · NCT05839717 · Data updated 2026-11-12

This study is trying to see if measuring certain genetic markers in blood cells can help predict the risk of blood clots in people with Myeloproliferative Neoplasms.

Quick facts

Study typeObservational
Ages18 Years and up
SexAll
Enrollment120 (estimated)
SponsorUniversity Hospital, Bordeaux
Academic / other
Drugs / interventionsruxolitinib, chemotherapy
Locations11 sites (Angers and 10 other locations)
StatusRecruiting
StartedJune 19, 2023
Main results expectedDecember 2025
Study endsDecember 2025
Registry record updatedDecember 17, 2024
Trial IDNCT05839717 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates include adults aged 18 and older who have been diagnosed with Polycythemia Vera or Essential Thrombocythemia and carry the JAK2V617F mutation.

Probably not a fit

Patients without the JAK2V617F mutation or those currently undergoing cytoreductive treatment may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This observational study focuses on patients diagnosed with Myeloproliferative Neoplasms (MPN) to investigate the relationship between the JAK2V617F allele burden in various cell types and the risk of thrombotic complications. It aims to measure the allele burden in platelets, red blood cells, granulocytes, and endothelial cells to identify high-risk clonality profiles. By isolating these cells from 120 patients, the study seeks to establish reliable biomarkers for predicting thrombotic risk in MPN patients.

Why it matters

Potential benefit: If successful, this study could lead to improved risk assessment and management strategies for patients with Myeloproliferative Neoplasms.

How similar studies have gone: While some studies have explored the JAK2V617F mutation's association with thrombotic risk, this approach of analyzing multiple cell types for clonality profiles is relatively novel.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Adult patient (age ≥ 18 years)
* Inclusion at diagnosis or during the year following the diagnosis of PV or ET (2016 WHO criteria except bone marrow biopsy that is optional), before introduction of a cytoreductive treatment
* Patient carrying a JAK2V617F mutation
* Subject registered with a social security scheme
* Written informed consent obtained
* Acceptance of inclusion in the FIMBANK registry (specific consent form needed)

Exclusion Criteria:

* ET or PV Patient not carrying a JAK2V617F mutation
* Patient with cytoreductive treatment (hydroxyurea, anagrelide, interferon, ruxolitinib or other chemotherapy) at the time of blood sampling
* Person under judicial safeguards, trustee or curatorship
* Person unable to give her consent
* Non-cooperative person
* Exclusion period after another clinical study or participation to another clinical study in the 30 days before inclusion

Where it's running

  • CHU d'Angers, Service Maladies du Sang
    Angers, France
    Recruiting
  • CH de Bayonne, Service Hématologie Clinique
    Bayonne, France
    Recruiting
  • CHU de Bordeaux, Service Médecine Interne et Maladies Infectieuses
    Bordeaux, France
    Recruiting
  • Institut Bergonié, Service Hématologie Clinique
    Bordeaux, France
    Recruiting
  • CHU de Brest, Service Hématologie Clinique
    Brest, France
    Recruiting
  • CH de Dax, Service Hématologie Clinique
    Dax, France
    Recruiting
Show 5 more locations
  • CH de Libourne, Service Hématologie Clinique
    Libourne, France
    Recruiting
  • CH de Mont de Marsan, Service Oncologie
    Mont-de-Marsan, France
    Recruiting
  • CHU de Bordeaux, Service Hématologie Biologie
    Pessac, France
    Recruiting
  • CHU de Bordeaux, Service Hématologie Clinique et Thérapie Cellulaire
    Pessac, France
    Recruiting
  • CHU de Bordeaux, Service Médecine Interne
    Pessac, France
    Not yet recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.