Description Module
The Description Module contains narrative descriptions of the clinical trial, including a brief summary and detailed description. These descriptions provide important information about the study's purpose, methodology, and key details in language accessible to both researchers and the general public.
Description Module path is as follows:
Study -> Protocol Section -> Description Module
Description Module
Ignite Creation Date:
2025-12-25 @ 12:14 AM
Ignite Modification Date:
2025-12-25 @ 12:14 AM
NCT ID:
NCT01853358
Brief Summary:
The goal of our study will be to determine the clinical and biological safety of infusing immuno-selected NK (Natural Killer) CD3-/CD56+ cells, early after allogeneic transplantation with colony stimulating factor (G-CSF) mobilized peripheral blood stem cells and Reduced Intensity Conditioning (RIC), as a potential substitute to usual "Donor Lymphocyte Infusion" (DLI), that contain the whole range of immune effectors. The trial will include several progressive steps: dose escalation up to a level compatible with the cost-effectiveness potential of the device and clinical situation and recombinant interleukin-2 (r-IL2) activation of selected NK cells in vitro prior to re-infusion.
Detailed Description:
In the mid 90's, it has been shown that donor lymphocyte infusions (DLI), when given for Chronic Myelocytic Leukemia (CML) that has relapsed after conventional allogeneic stem cell transplantation (SCT), result in a high incidence of durable cytogenetic and molecular remissions. However, regular documented effects are the occurrence of secondary aplasia and/or graft-versus-host disease (GVHD) including the post RIC situation. These effects are related to the high content of cytotoxic T cells in the DLI. Attempts to deplete CD8+ T-cells from DLI have been conducted with promising results but are not totally satisfactory.
More recently the infusion of r-IL2 ex-vivo activated autologous or allogeneic NK-selected cells have been studied and the safety established in patients presenting various malignancies.
Indeed, NK are thoroughly characterized in terms of genotype, phenotype and function. Although a handful of clinical-grade reagents and devices exist that give access to the human NK cell compartment, an immuno-selection device exists that allows for the selection of NK cells from various types of hematopoietic cell collections in view of clinical applications: the process produces CD3-/CD56+ cells in two steps and have been used in the previous experiences.
Study:
NCT01853358
Study Brief:
Protocol Section:
NCT01853358