Transplantation of Ex-vivo Expanded Cord Blood Stems Cells (GRAPA)

University Hospital of Bordeaux

Status and phase

Completed

Phase 2

Conditions

Malignant Haematological Disease

Treatments

Other: allogeneic transplant

Study type

Interventional

Funder types

Other

Identifiers

NCT01034449

CHUBX 2008/12

Details and patient eligibility

About

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.

Full description

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.

Enrollment

16 patients

Sex

All

Ages

18 to 65 years old

Volunteers

No Healthy Volunteers

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