Study of the Medullary Microenvironment in Acute Childhood Leukemia
For patients and families
In plain language
An automatic summary of structured registry data. It is an orientation aid, not a substitute for the official protocol or a physician assessment.
- What is being studied
- The protocol lists: Biological sampling in patients, Biological sampling in control patients.
- Who it may be relevant to
- Registry conditions: Acute Lymphoid Leukemia, Acute Myeloid Leukemia in Children. Basic parameters: 1 year — 15 years · All.
- What needs checking
- Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
- Where it takes place
- France
- Next step
- Save the trial, show it to the treating physician, and confirm current recruitment with the study center. Costs, documents and travel →
Unsure about the terms? Read our patient guide →
Official title
Etude du Microenvironnement médullaire Dans Les Leucémies Aiguës de l'Enfant
Overview
Acute leukemia (AL) is the most common cancer in children. Despite the optimization of chemotherapy treatments and the development of supportive care, a certain number of LAs relapse and/or progress to death of the child. It therefore seems essential to try to better understand the physiopathology and the mechanisms of resistance to treatment of these diseases.
Detailed description
Acute leukemia (AL) is the most common cancer in children. Despite the optimization of chemotherapy treatments and the development of supportive care, a certain number of AL's relapse and/or progress to death of the child. It therefore seems essential to try to better understand the physiopathology and the mechanisms of resistance to treatment of these diseases. The study of the microenvironment appears in this context as a promising avenue. The bone marrow microenvironment is composed of an extracellular matrix and cells, in particular mesenchymal stromal stem cells (MSC's). In adult acute leukemia, it has been clearly demonstrated that these microenvironment cells are reprogrammed by leukemia cells to allow the development and proliferation of the latter. Links have also been demonstrated in acute leukemia between the cells of the microenvironment and resistance to chemotherapy. In a certain number of cases, the support of the microenvironment for the development of leukemia or resistance to chemotherapy involves modulation of the energy metabolism of leukemia cells. This notably involves interactions between leukemic cells and MSCs and re-programming of the energy metabolism of the latter. To date, there are only very few studies concerning the role of the microenvironment in acute childhood leukemia and none to date has specifically studied the energy metabolism (oxidative phosphorylation and glycolysis) of MSCs.
Interventions
- Procedure Biological sampling in patients
blood and bone marrow samples from patients with Acute Leulemia. - Procedure Biological sampling in control patients
blood and bone marrow samples from children undergoing orthopedic surgery exposing the bone marrow.(osteotomy of the pelvis).
Primary outcome measures
- Oxygen Consumption Rate [Time frame: At inclusion]
Secondary outcome measures (7)
- Difference in Extra Cellular Acidification Rate [Time frame: At inclusion]
- Difference in Reactive Oxygen Species [Time frame: At inclusion]
- Difference in doubling time in culture [Time frame: At inclusion]
- Difference in Immunophenotypic profile [Time frame: At inclusion]
- Difference in mutational profiles between MSCs and leukemia cells [Time frame: At inclusion]
- Differences in transcriptomic signatures between MSCs and MSC subpopulations [Time frame: At inclusion]
- Differences in cytokine profiles within the bone marrow [Time frame: At inclusion]
Eligibility criteria
Inclusion criteria
- for patients with AL:
- Child with acute lymphoblastic or myeloblastic leukemia at diagnosis
- Not having received prior hematological treatment
- Aged 1 to 15 years old
- Whose 2 parents, or the holder of parental authority, have signed a consent enlightened.
- Affiliated patient or beneficiary of a social security scheme.
- Control group patients:
- Child undergoing orthopedic surgery exposing the bone marrow (osteotomy of the pelvis).
- Aged between 1 and 15 years old.
- Having no pathology of hematological origin.
- Not having received any treatment that could interfere with the functioning of the bone marrow.
- Whose 2 parents or the holder of parental authority have signed a consent enlightened.
- Affiliated patient or beneficiary of a social security scheme.
Exclusion criteria
- for patients with AL:
- Patient under 1 year old and over 15 years old.
- Contraindication to myelogram.
- Absence of signature of the informed consent by the 2 parents or the holder of parental authority.
- Patients with relapsed acute lymphoblastic or myeloblastic leukemia.
- Having received prior hematological treatments.
- Parents with physical or mental condition not allowing to understand the informed consent.
- Control group patients
- Patient under 1 year old and over 15 years old.
- Having an underlying haematological pathology.
- Absence of signature of the informed consent by the 2 parents or the holder of parental authority.
- Having received prior hematological treatments.
- Parents with physical or mental condition not allowing to understand informed consent.
Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.
Healthy volunteers: Yes
Study design
- Allocation
- Non-randomized
- Model
- Parallel assignment
- Masking
- Open label
- Primary purpose
- Diagnostic
Study locations
France · 3 centers
- Service d'hématologie biologique-CHRU TOURS — Tours
- Service d'onco-hématologie pédiatrique -CHRU Tours — Tours
- Service de chirurgie orthopédique pédiatrique -CHRU TOURS — Tours
Identifiers
NCT: NCT05792007 · DR220254-MILA · 2022-A02570-43