Biomarkers Impact Evaluation on the Post-transplant Immune Response After Allografting of Hematopoietic Stem Cells

Study Overview
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Brief Summary
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Chemotherapy or targeted therapy are usually used to treat hematological pathologies. Despite of medical improvement, some of these pathologies present drug resistances, or high risk of relapse. Hematopoietic stem cell (HSC) transplantation remain the gold standard of consolidation, to maintain a durable response. In this situation, allograft with hematopoietic stem cells donor aims at producing Graft-versus-Tumor effect, by producing a new immune system, reproducing anti-tumoral immunity. However, all hemopathies do not have the same sensibility. Nowadays, mechanisms underlying this phenomenon remain poorly understood. Indeed, few data precisely document the expression of immunological checkpoints and other biomarkers in the context of allogeneic HSC transplantation, particularly their impact on post-transplant outcome.

Detailed Description
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Chemotherapy or targeted therapy are usually used to treat hematological pathologies. Despite of medical improvement, some of these pathologies present drug resistances, or high risk of relapse. Hematopoietic stem cell (HSC) transplantation remain the gold standard of consolidation, to maintain a durable response. In this situation, allograft with hematopoietic stem cells donor aims at producing Graft-versus-Tumor effect, by producing a new immune system, reproducing anti-tumoral immunity. However, all hemopathies do not have the same sensibility. Nowadays, mechanisms underlying this phenomenon remain poorly understood. Indeed, few data precisely document the expression of immunological checkpoints and other biomarkers in the context of allogeneic HSC transplantation, particularly their impact on post-transplant outcome. Therefore, we want to systematically study the expression profile of different biomarkers during allogeneic transplantation, in order to establish a correlation between these expression patterns and post-transplant outcome. Ultimately, this research will enable to (i) have tools to predict the post-transplant response and (ii) define whether a targeted therapy could be beneficial or be contraindicated for adequate patient management. Patients will be selected for the study once they meet all the inclusion criteria. The study will be proposed to them during the pre-allogeneic consultation as part of their usual care. This study does not modify the treatment or the usual management of patients according to the current practice of pre- and post-transplant management. Clinically, it consists of building up a relevant biological collection.

Official Title
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Biomarkers Impact Evaluation on the Post-transplant Immune Response After Allografting of Hematopoietic Stem Cells: MENTALO Study

Conditions
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Malignant Hemopathy

Intervention / Treatment
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* Other: Blood samples


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Adult patient, over 18 years of age, suffering from a malignant hemopathy (without exception), Patient for whom an allogeneic hematopoietic stem cell transplant from a related or unrelated donor is indicated, Signed informed consent, Patient covered by a social security scheme. Exclusion Criteria: Allogeneic hematopoietic stem cell transplantation from cord blood or haplo-identical transplant, Allogeneic transplant with post-transplant cyclophosphamide treatment, Allograft with sequential conditioning.

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Prevention
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: patients with hematologic malignancy<br>Adult patient, over 18 years old, suffering from a malignant hemopathy (without exception) for whom an allogeneic hematopoietic stem cell transplant from a related or unrelated donor is indicated | Other: Blood samples<br>* A peripheral blood sample will be taken and will include 2 EDTA tubes of 5 mL, for a total volume of 10 mL: Samples before the allograft, Samples at different times post-allograft: 15 days, 30 days, 60 days, 90 days, 180 days, 360 days, Samples in the event of the occurrence of concomitant events during the 12-month follow-up period: occurrence of acute Graft Versus Host Disease, chronic Graft Versus Host Disease, or relapse of the disease before the initiation of a new treatment.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Expression level of Programmed death-ligand (PD) plasmatic biomarkers | Expression level of Programmed death-ligand (PD) plasmatic biomarkers will be quantified | 12 months | 
| Expression level of ST2 (suppression of tumourigenicity 2) plasmatic biomarkers | Expression level of ST2 (suppression of tumourigenicity 2) plasmatic biomarkers will be quantified | 12 months | 
| Expression level of Reg3 (regenerating islet-derived 3-alpha) plasmatic biomarkers | Expression level of Reg3 (regenerating islet-derived 3-alpha) plasmatic biomarkers will be quantified | 12 months | 
| Expression level of Elafin plasmatic biomarkers | Expression level of Elafin plasmatic biomarkers will be quantified | 12 months | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Allograft, Hematopoietic stem cells, Biomarkers, Immune response