Clinical Research Directory

Immunomonitoring After Hematopoietic Stem Cell Transplantation

Sponsor: Centre Hospitalier Universitaire de Nice

Summary

Allogeneic hematopoietic stem cell transplantation (HSCT) remains the only curative option for many hematologic malignancies, in particular acute leukemias and myelodysplastic syndromes. At the center of these reactions are the donor's T and NK cells. Several studies have highlighted the impact of T cells reconstitution on post-transplant infection rates, relapse and GvHD. Most of the post-allogeneic immune reconstitution studies available to us today include young patients (\<60 years of age) who have had genoidentic or phenoidentic 10/10 allografts and mostly only study the phenotype of a limited number of immune cells. While it is important to know the absolute number reconstitution kinetics of the different categories of immune cells, it is essential to also be able to assess the function of the different cells. Knowledge of the restoration of T function at key dates after allogeneic stem cell transplantation would make it possible to adapt post allogeneic immunomodulation (immunosuppressive treatment and injections of donor lymphocytes) and anti-infectious prophylaxis for patients. The measurement of cytokine profiles after nonspecific stimulation of T and NK lymphocytes recently made available to the immunology laboratory of the CHU de Nice allows a routine assessment of T lymphocyte function (Th1, Th2 Th 17 and T regulatory) and NK by measurement of the secretion of different cytokines after stimulation of the patient's lymphocytes with different antigens (anti-CD3 and anti-TLR7). The cytokine profile during immune reconstitution in hematopoietic cell transplants has never been evaluated; we will analyze it with regard to clinical data: relapse, infections and GVHD.

Official title: Immunomonitoring After Hematopoietic Stem Cell Transplantation for Hematological Malignancies Using Cytokines Profiling and Flow Cytometry

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