HLA Haploidentical Bone Marrow Transplant in Patients With Severe Sickle Cell Disease (DREPHAPLO)

September 5, 2023 updated by: Nathalie Dhédin, Centre Hospitalier Intercommunal Creteil

Bone Marrow Transplantation HLA Haploidentical After a Reduced Intensity Conditioning and Prevention of GvHD Based on Post-transplant Cyclophosphamide Administration in Patients With Severe Sickle Cell Disease

multicentric interventional biomedical research phase II, prospective, non-randomized evaluating a haploidentical marrow transplants after reduced-intensity conditioning and prevention of GvHD based on cyclophosphamide administration post transplantation in patients with severe sickle cell disease.

Study Overview

Status

Active, not recruiting

Conditions

Intervention / Treatment

Detailed Description

Sickle cell disease is a severe disease with frequent occurrence of painful crises and progressive installation of a multi organ injuries. Despite the progress in its management, particularly since the introduction of hydroxycarbamide, the median age of death in sickle cell patients was about 40 years in a recent US study. Severe forms resistant to hydroxyurea or cerebral vasculopathy require transfusion programs throughout susceptible to risks of iron overload and alloimmunization. The bone marrow transplantation cures almost 95% of children and adolescents transplant from an HLA-identical siblings. In patients without HLA-identical donor, interesting results have been reported in haploidentical transplants marrow without ex vivo T cell depletion taken after non myeloablative conditioning regimen and GvHD prevention with cyclophosphamide high dose injection after bone marrow transplant . This approach performed in 14 patients was effective to cure 50% of the patients and 50% have rejected the transplant . No death or severe GvHD were related to the procedure.

DREPHAPLO protocol aims to evaluate that approach in a population of sickle cell patients with severe complications of the disease, bringing direct benefit to patients with a cure of the disease in at least half of them.

Study Type

Interventional

Enrollment (Estimated)

18

Phase

  • Phase 2

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

      • Créteil, France, 94000
        • CHU Henri-Mondor
      • Créteil, France, 94000
        • intercommunal hospital of Créteil
      • Marseille, France
        • CHU La Timone
      • Paris, France
        • Saint-Louis Hospital
      • Paris, France
        • Hospital Necker
      • Paris, France
        • Hospital Robert-Debré
      • Strasbourg, France
        • CHU Strasbourg

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

13 years to 40 years (Child, Adult)

Accepts Healthy Volunteers

No

Description

Inclusion criteria recipient:

  • Age: 13 years-40 years
  • Severe Sickle cell with at least one of the following criteria:

    • Stenosing vasculopathy with abnormal MRA despite prolonged transfusion program
    • PAH confirmed by right catheterization with mPAP> 25mmHg
    • Systolic ejection fraction <55% and tricuspid regurgitation speed> 2.5m /s at distance from an acute episode
    • No possibility of blood transfusion or very complicated blood transfusion
    • Report albumin / creatinine> 30 mg / mmol, confirmed 3 times, away at distance from acute episode and persistent despite hydroxyurea or IEC
    • GFR <80ml / min /1.73m2 (CKD-Epi without ethnic criterion)
    • Previous history of acute liver sequestration with liver failure
    • Acute chest syndrome or vaso-occlusive crises under hydroxyurea
    • Complications of sickle cell transfusion imposing an exchange program with no possible withdrawal beyond a period of one year
  • Not having geno-identical donor, but a haploidentical major donor (parent, sibling, adult child, or HbAA AS)
  • Having red and understood the information letter and signed the informed consent
  • Patients affiliated to a social security system (Social Security or Universal Medical Coverage)

Exclusion Criteria recipient:

  • Patient with a geno-identical donor
  • Performans status: ECOG> 1
  • lung disease: FEV1 and FVC <50% predicted,
  • score of PAH NYHA≥2
  • Liver disease with bilirubin> 50 .mu.mol / L
  • heart failure defined by NYHA≥3 score ejection fraction <45% or shortening fraction <24%
  • anti HLA alloimmunization against the donor or against red cell antigens of the donor
  • Serology or HIV viral load positively
  • Patients who for family, social or geographical reasons, do not wish to be regularly monitored in consultation
  • severe uncontrolled infection at the time of inclusion or graft
  • pregnant woman (positive beta HCG) or during lactation
  • incapable adult patient, trust, guardianship, or safeguard justice

Inclusion criteria donor

  • Age> 18 years and <60 years
  • Viral serologic economy allows the graft
  • No contraindication for general anesthesia
  • No contraindication the administration of G-CSF (the existence of sickle cell trait is not a contraindication)
  • Lack antigens HLA recognized by the recipient antibody
  • Hemoglobin S <50%
  • When several donors are compatible: choose according to the ABO recipient: prefer ABO compatibility and major incompatibility and minor incompatibility, and finally major and minor incompatibility.
  • Signature of informed consent
  • Non-inclusion criteria donors: β HCG positive or known pregnancy

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Other
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: bone marrow transplant

All the included patient will receive an haploidentical bone marrow transplant with the following protocol concerning the conditioning and GvHD prevention

Conditioning

  • THYMOGLOBULINE : 0.5mg/kg at D-9 and 2 mg/kg at D-8 and D-7
  • THIOTEPA: 10mg/kg/j at D-7
  • CYCLOPHOSPHAMIDE (Endoxan®):14.5mg/kg/j at D-6 and D-5
  • FLUDARABINE (Fludara®): 30mg/m2 per Day from D-6 to D-2
  • TBI : 2GY : D -1 Graft : Injection at D0 of G-CSF-stimulated bone marrow transplant.

Prophylaxis of GvHD

  • CYCLOPHOSPHAMIDE (Endoxan®): 50mg/Kg per Day from D+3 to D+4
  • Sirolimus and MycophénolateMofétil (MMP) from D+5. In the absence of acute GvHD (aGvHD), stop of MMP to D35 and pursuit of sirolimus 1 year after the graft.
haploidentical bone marrow transplant

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Survival rate
Time Frame: 2 years
Survival without sickle cell survival rate (electrophoresis of hemoglobin similar to that from the donor, that is to say a percentage of HbS not exceeding 10% of that of distance donor transfusions and that of a stable manner and without GvHDc other than mild
2 years

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Survival rate
Time Frame: 1 year
Survival without sickle cell survival rate (electrophoresis of hemoglobin similar to that from the donor, that is to say a percentage of HbS not exceeding 10% of that of distance donor transfusions and that of a stable manner and without GvHDc other than mild
1 year
haematologic reconstitution
Time Frame: 2 years
defined as a neutrophil count> 500 / mm3 and platelets> 20000 / mm3, for three consecutive days.
2 years
Chimerism
Time Frame: at month 1
Chimerism in the peripheral blood of the total population and the CD3 + population with the techniques usually employed by the centers
at month 1
Chimerism
Time Frame: at month 2
Chimerism in the peripheral blood of the total population and the CD3 + population with the techniques usually employed by the centers
at month 2
Chimerism
Time Frame: at month 3
Chimerism in the peripheral blood of the total population and the CD3 + population with the techniques usually employed by the centers
at month 3
Chimerism
Time Frame: at month 4
Chimerism in the peripheral blood of the total population and the CD3 + population with the techniques usually employed by the centers
at month 4
Chimerism
Time Frame: at month 5
Chimerism in the peripheral blood of the total population and the CD3 + population with the techniques usually employed by the centers
at month 5
Chimerism
Time Frame: at month 6
Chimerism in the peripheral blood of the total population and the CD3 + population with the techniques usually employed by the centers
at month 6
Chimerism
Time Frame: at month 9
Chimerism in the peripheral blood of the total population and the CD3 + population with the techniques usually employed by the centers
at month 9
Chimerism
Time Frame: at month 12
Chimerism in the peripheral blood of the total population and the CD3 + population with the techniques usually employed by the centers
at month 12
Chimerism
Time Frame: at month 24
Chimerism in the peripheral blood of the total population and the CD3 + population with the techniques usually employed by the centers
at month 24
hemoglobin electrophoresis
Time Frame: at 1 month
at 1 month
hemoglobin electrophoresis
Time Frame: at 2 month
at 2 month
hemoglobin electrophoresis
Time Frame: at 3 months
at 3 months
hemoglobin electrophoresis
Time Frame: at 4 months
at 4 months
hemoglobin electrophoresis
Time Frame: at 5 months
at 5 months
hemoglobin electrophoresis
Time Frame: at 6 months
at 6 months
hemoglobin electrophoresis
Time Frame: at 9 months
at 9 months
hemoglobin electrophoresis
Time Frame: at 12 months
at 12 months
hemoglobin electrophoresis
Time Frame: at 24 months
at 24 months
occurence of graft versus host disease
Time Frame: at month 24
evaluated monthly from M1 to M6, and M9, M12, M24
at month 24
grade of graft versus host disease
Time Frame: at month 24
Incidence and grade of GvHD, toxic deaths and infectious complications and secondary cancer
at month 24
occurrence of toxic deaths
Time Frame: at month 24
at month 24
occurrence of infectious complications
Time Frame: at month 24
at month 24
occurrence of secondary cancer
Time Frame: at month 24
at month 24
Lymphocyte immunophenotyping
Time Frame: 2 years
Lymphocyte immunophenotyping T, B and NK + The Extended Phenotype including activation markers, assessment of naive people and memories, T reg populations etc) and plasma protein electrophoresis: 1 month, 3 months, 6 months, 12 months and 24 months post-transplantation.
2 years
ECOG score value
Time Frame: 2 years
Index Trading ECOG complete physical examination with determination of weight
2 years
Assessment of sickle cell disease complications
Time Frame: at 1 year
Microalbuminuria, creatinuria; echocardiography for measurement of systolic ventricular ejection fraction (February), PAH research and measurement IT Vmax; respiratory function tests with measurement of DLCO; MRI brain with ARM and Cervical Pre-transplant anomalies; Radio of the pelvis
at 1 year
ferritin dosage
Time Frame: at month 3
Evaluation of iron overload by ferritin
at month 3
ferritin dosage
Time Frame: at month 6
Evaluation of iron overload by ferritin
at month 6
MRI iron overload
Time Frame: at 12 months
hepatic and cardiac MRI to assess the iron overload
at 12 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

August 10, 2017

Primary Completion (Estimated)

March 1, 2024

Study Completion (Estimated)

September 1, 2025

Study Registration Dates

First Submitted

July 31, 2017

First Submitted That Met QC Criteria

August 2, 2017

First Posted (Actual)

August 7, 2017

Study Record Updates

Last Update Posted (Actual)

September 6, 2023

Last Update Submitted That Met QC Criteria

September 5, 2023

Last Verified

September 1, 2023

More Information

Terms related to this study

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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