Transplantation of Ex-vivo Expanded Cord Blood Stems Cells

Study Overview
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Brief Summary
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This program offers the opportunity to receive an allogeneic transplant to try to control the malignant hematologic in the absence of acceptable conventional donor and with a risk-benefit ratio equivalent to that which would be expected with a transplant from a more conventional donor. An economy of means in that this method could serve as an alternative to 2 units of placental blood transplantation. The current cost of disposal of a unit of placental blood from a bank is approximately 22000 € (Source: Biomedicine Agency, 2007 rates). The amplification process as controlled by EFSAL is 12000 €. Therefore, buying a unit and ex-vivo amplification is more economical. Moreover, the availability of placental blood is not infinite, and the use of one unit per patient will also save resources that can be valuable for certain groups of patients. In the longer term, methods of amplification of specific immunocompetent cells (from the fraction of CD 34 neg cells) are already being evaluated in the laboratory. They allow to consider a faster recovery, better and more targeted, including cells against the disease for which transplantation is performed.

Detailed Description
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This is a multicenter prospective non randomized phase 2 clinical trial. The primary objective is defined by getting a neutrophil count above 500/ml for 3 consecutive days at day 42 after transplantation, in association with complete or partial chimerism on T cells (10 % to 90%). The secondary objectives are: the feasibility of expansion, tolerance immediate injection of a graft amplified, the payback of a platelet count> 20 000/microlitre without transfusion, Incidence of graft loss or rejection within 6 months following transplantation, the incidence of acute and chronic GVHD, the mortality rate associated with transplantation, the incidence of relapse of hematologic malignancies, Overall survival, Disease-free survival at 1 year post transplant.

Official Title
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Transplantation of Ex-vivo Expanded Human Cord Blood Hematopoietic Stem Cells Expanded: Evaluation of Hematopoietic and Immunologic Reconstitution After a Reduced-intensity Conditioning Regimen

Conditions
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Malignant Haematological Disease

Intervention / Treatment
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* Other: allogeneic transplant


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Age ≥ 18 and < 66 years Patient with acute myeloid leukemia (AML) high risk in 1st complete remission: CR1 obtained by 2 cycles of chemotherapy, unfavorable Cytogenetics FLT3 Duplication, Or acute myeloid leukemia (AML) in 2nd complete remission, Or acute lymphoblastic leukemia (ALL) High-risk 1st complete remission: Presence of the translocation t (9; 22), Or acute lymphoblastic leukemia (ALL) in 2nd complete remission, Or Chronic Myeloid Leukemia (LCM) beyond the 1st chronic phase Or Myelodysplasia or with IPSS score with 2 or more Or Hodgkin's disease in sensitive relapse or beyond the 2nd complete remission. or following types of lymphoma : Diffuse large B lymphoma cells relapsed or refractory after two lines of treatment or after a line with autologous hematopoietic stem cell, or Mantle cell lymphoma relapsed or refractory after two lines of treatment or after a line with autologous hematopoietic stem cell Others aggressive lymphoma for which an indication of allograft is selected (Burkitt lymphoma, lymphoblastic lymphoma, intravascular lymphoma, ...) Lymphoma (low-grade follicular lymphoma, marginal zone lymphoma) in histological transformation. Low-grade lymphoma for which an indication of allograft is retained Unable to receive myeloablative conditioning because of age (> 45 years) and/or the existence of co-morbidities precluding a myeloablative conditioning (status ECOG > / = 2, DLCO <50%, fungal infection proven or probable in the previous 60 days) and / or prior treatment with total body irradiation at doses above 2 Gy or busulfan doses> 8 mg/kg No contra-indication for a transplant in allogeneic non-myeloablative conditioning, No HLA-identical sibling, Absence of an unrelated donor on national or international registering with a 10/10 allelic matching or a 9/10 allelic matching with the only tolerated mismatches being: HLA-C. No unit of placental blood available fulfilling the characteristics of compatibility (HLA compatible at least 4/6 allele or generic) and richness Provision of at least 2 units of placental blood, whose compatibility is 4/6, 5/6 or 6/6 and whose richness is before thawing, > 2 x 107 and < 3 to 4 x 107 nucleated cells per/kg. Patient affiliated to a social security scheme, Free and informed consent signed by the patient and the investigator. Exclusion Criteria: Age <18 and ≥ 66 years Malignant myeloid or lymphoid acute or chronic disease without indication for an allogeneic transplant according to the criteria of European Bone Marrow Transplantation Group. Able to receive a myeloablative conditioning because of age (<45 years) and the absence of co morbidities (status ECOG> / = 2, DLCO <50%, fungal infection proven or probable in 60 preceding days) and the absence of prior treatment with total body irradiation at doses above 2 Gy or busulfan doses> 8 mg / kg Contra indication for a non-myeloablative conditioning, HLA-identical sibling available Availability of an unrelated donor on a national or international register with 10/10 or 9/10 HLA matching (HLA-C Mismatch tolerated). At least one unit of cord blood available with the characteristics of compatibility (HLA compatible at least 4/6 allelic or generic) and richness (before thawing> / = 3 to 4 x 107 nucleated cells/kg recipient, by degree of compatibility) Absence of at least 2 units of placental blood, whose compatibility is 4/6, 5/6 / or 6/6 and whose richness before thawing is > 2 x 107 and < 4 x 107 nucleated cells per/kg of recipient. Women of childbearing age not using contraception, pregnant or lactating

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 65 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: Treatment
Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Intervention/Treatment |
| --- |
|Other: allogeneic transplant|ex vivo amplification of a unit of placental blood for transplantation|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| The number of granulocytes, which will be evaluated daily after transplantation. And chimerism to be measured on the cells (total nucleated cells and lymphocytes) from peripheral blood on days 15, 42, 60, 100, 180, 360. |  | Daily for Blood évaluation and on days 15-42-60-100-180-360 for chimérisme évaluation. | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| feasibility of expansion |  | during and after expansion | 
| Immediate tolerance of a graft amplified injection. Determined by measurement of vital parameters during injection of the graft and within 3 hours of observation and clinical tolerance. |  | during injection of the graft and within 3 hours of observation | 
| The payback of a platelet count> 20 000/microlitre bloodless. Measured by the blood count and platelet daily during hospitalization and at least 2 times a week. |  | until the payback of the platelet count : measured daily during hospitalization and at least 2 times a week after | 
| The length of hospitalization since the beginning of conditioning until the first exit for more than 2 days. |  | lenght of hospitalization since the beginning of conditioning | 
| The number of transfusions of red blood cells and platelets during the 1st hospitalization |  | during the first hospitalization | 
| The incidence of graft loss or rejection within 6 months after transplantation, defined as the installation of a central cytopenia with loss of chimerism |  | Within 6 months after transplantation | 
| The incidence of acute and chronic GVHD,determined by clinical examination Biopsies of target organs(skin, intestine, liver) will be conducted to confirm the diagnosis if possible. |  | daily during hospitalization and at least twice weekly until D 100 after transplantation and then weekly or bi-monthly until one year post transplant. | 
| The mortality rate for transplantation in the year following the transplant, |  | in the year following the transplant | 
| The incidence of relapse of hematologic malignancies, |  | in the year following the transplant | 
| survival and disease-free survival in the year following the transplant |  | in the year following the transplant | 
| Monitoring of immune reconstitution. This reconstruction will be followed by determining the rate of immunoglobulin G, M and A and the number of T lymphocytes CD3 +, CD4 + and CD8 + (assessments on days 15, 42, 60, 100, 180, 360). |  | on days 15, 42, 60, 100, 180, 360 | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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allo graft, cord blood, expansion, reduced-intensity conditioning