Clinical trial Recruiting at 20 sites Phase 2 Interventional Ages 18 to 99

Comparing two treatment regimens for adults with acute myeloid leukemia before stem cell transplant

Official title: FLUCLORIC: Randomized Multicentric Phase III Study Comparing the Efficacy of 2 Reduced Intensity Conditioning Regimens (Clofarabine/Busulfan vs Fludarabine/Busulfan) in Adults With AML and Eligible to Allogeneic Stem Cell Transplantation

Run by Nantes University Hospital · NCT05917405 · Data updated 2026-11-12

This study is testing if a treatment using Clofarabine helps adults with acute myeloid leukemia live longer after a stem cell transplant compared to another treatment with Fludarabine.

Quick facts

PhasePhase 2
Study typeInterventional
Ages18 Years to 99 Years
SexAll
Enrollment302 (estimated)
SponsorNantes University Hospital
Academic / other
Drugs / interventionsFludarabine
Locations23 sites (Nantes, Loire Atlantique and 22 other locations)
StatusRecruiting
StartedSeptember 14, 2023
Main results expectedSeptember 14, 2028
Study endsSeptember 14, 2028
Registry record updatedJanuary 30, 2026
Trial IDNCT05917405 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults aged 18 and older with de novo or secondary AML in complete remission, eligible for a reduced-intensity conditioning regimen.

Probably not a fit

Patients with active disease or those not eligible for a reduced-intensity conditioning regimen 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 study aims to compare the efficacy of two reduced-intensity conditioning regimens, Clofarabine and Fludarabine, in adults with acute myeloid leukemia (AML) who are in complete remission and eligible for allogeneic stem cell transplantation. The trial will include 302 patients, with the primary objective of demonstrating a significant improvement in 2-year overall survival rates for those receiving the Clofarabine regimen. Additionally, the study will conduct cost-utility and cost-effectiveness analyses, as well as assess the quality of life post-transplant. The results will help establish the superiority of CloB2A2 over FB2A2 in this patient population.

Why it matters

Potential benefit: If successful, this study could lead to improved survival rates for AML patients undergoing stem cell transplantation.

How similar studies have gone: Retrospective studies have shown promising results for Clofarabine compared to Fludarabine, suggesting potential success for this prospective trial.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

Age ≥ 18 years' old

* De novo or secondary AML (according to ELN 2022 classification) in complete cytological remission at time of transplant (bone marrow blast count \< 5%) or MDS/LAM with bone marrow blast count ≤ 5%
* Patients in first or second line therapy are allowed
* Patient eligible to a RIC regimen : patients aged ≥ 60 year old or \<60 with co-morbidity(ies).
* Patient with a related or an unrelated matched donor
* Graft using only peripheral blood stem cells
* Performance status ECOG 0 - 2
* Who provide their written informed consent
* Previous allograft allowed
* Affiliated with French social security system or beneficiary from such system
* Women must meet one of the following criteria at the time of inclusion:

  * use adequate contraceptive measures as recommended by the CTFG (Recommendations related to contraception and pregnancy testing in clinical trials v1.1; includes injectable implants, dual hormone birth control pills, intrauterine devices, abstinence from sex, or a sterilized partner), and have a negative pregnancy test (urine or serum pregnancy test) prior to receiving the first dose of study drug;
  * or be post-menopausal (over 50 years of age with amenorrhea for at least 12 months after discontinuation of all exogenous hormonal therapy)
  * or (if under 50 years of age) have been amenorrheic for at least 12 months after discontinuation of exogenous hormonal therapy and with luteinizing hormone (LH) and follicle stimulating hormone (FSH) levels corresponding to post-menopausal levels
  * or have undergone irreversible surgical sterilization by hysterectomy, bilateral oophorectomy or bilateral salpingectomy (this operation must be documented).
  * Contraception methods must be prescribed using effective contraceptive methods during treatment and within 6 months for women of childbearing age (WOCB) and 6 months for men in case they have sexual relations with WOCB after the last dose of Fludarabine/Clofarabine.

Exclusion Criteria:

* Pro-myelocytic leukemia
* Patient eligible to a myeloablative conditioning regimen
* Patient with haploidentical, mismatched unrelated donor or umbilical cord blood
* Pregnant or breastfeeding woman or patient refusing contraceptive mesures
* HIV positive
* Active Hepatitis B or C
* Left ventricular ejection fraction \< 50%.
* DLCOc \<40%
* Uncontrolled infection
* Uncontrolled haemolytic anaemia
* Creatinine clearance \< 50 ml/min (evaluated by MDRD or CKDEPI).
* Serum bilirubine \> 30 mmol/l, Cytolysis \> 5 the upper limit range
* Previous or concurrent second malignancy except for adequately treated basal cell carcinoma of the skin, curatively treated in situ carcinoma of the cervix, curatively treated solid cancer, with no evidence of disease for at least 2 years
* Any psychological, familial, sociological or geographical condition potentially hampering compliance with the study protocol and follow-up schedule
* Participation to another interventional study during the last month or expected participation to another interventional study during participation to the FLUCLORIC study.

Where it's running

  • CHU de Nantes
    Nantes, Loire Atlantique, France
    Recruiting
  • CHU Amiens
    Amiens, France
    Recruiting
  • CHU Angers
    Angers, France
    Recruiting
  • CHU Besançon
    Besançon, France
    Recruiting
  • CHU Brest
    Brest, France
    Recruiting
  • CRLC Caen
    Caen, France
    Recruiting
Show 17 more locations
  • CHU Clermont-Ferrand
    Clermont-Ferrand, France
    Recruiting
  • APHP Créteil
    Créteil, France
    Recruiting
  • CHU Grenoble
    Grenoble, France
    Recruiting
  • CHU Limoges
    Limoges, France
    Recruiting
  • CHU Lyon
    Lyon, France
    Recruiting
  • Institut Paoli Calmettes
    Marseille, France
    Recruiting
  • CHU Montpellier
    Montpellier, France
    Recruiting
  • CHRU Nancy
    Nancy, France
    Recruiting
  • CHU Paris St-Louis
    Paris, France
    Recruiting
  • Pitie-Salpetriere, APHP
    Paris, France
    Recruiting
  • St-Antoine, APHP
    Paris, France
    Recruiting
  • CHU Rennes
    Rennes, France
    Recruiting
  • CHU St-Etienne
    Saint-Etienne, France
    Recruiting
  • CRLC Toulouse
    Toulouse, France
    Recruiting
  • CHU Bordeaux
    Bordeaux, France
    Not yet recruiting
  • CHRU Lille
    Lille, France
    Not yet recruiting
  • CHU Poitiers
    Poitiers, France
    Not yet recruiting

Study contacts

  • Principal investigator: patrice CHEVALLIER, Pr — Nantes University Hospital
  • Study coordinator: Patrice CHEVALLIER, Pr
  • Email: patrice.chevallier@chu-nantes.fr

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.