| Autor: |
E, Contassot, W, Murphy, R, Angonin, J J, Pavy, M C, Bittencourt, E, Robinet, C W, Reynolds, J Y, Cahn, P, Hervé, P, Tiberghien |
| Rok vydání: |
1998 |
| Předmět: |
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| Zdroj: |
Transplantation. 65(10) |
| ISSN: |
0041-1337 |
| Popis: |
We are presently investigating the therapeutic potential of herpes simplex-thymidine kinase-expressing donor T cells in the setting of a T cell-depleted allogeneic bone marrow transplantation. The generation, expansion, and selection of the gene-modified T cells require a 12-day ex vivo culture period in high-dose interleukin (IL)-2 that could significantly alter their in vivo alloreactivity.We evaluated the alloreactive potential of such cultured cells in a murine allogeneic bone marrow transplantation model.The present studies demonstrate that ex vivo-expanded cultured T cells are capable of strong alloreactivity as evidenced by the occurrence of lethal acute graft-versus-host disease (GVHD). However, GVHD mortality after administration of the cultured T cells occurred later than after the administration of a same number of fresh T cells. Similar kinetics of GVHD-induced mortality between cultured and fresh T cells required a 10-fold increase in the number of cultured T cells, indicating a reduced alloreactive potential of these cells. The addition of a 2-day "resting" period in low-dose IL-2 resulted in T cells with enhanced alloreactive potential identical to the alloreactivity observed with fresh T cells.Ex vivo IL-2-expanded T cells are capable of significant in vivo alloreactivity. However, an increase in the number of cultured T cells administered or the introduction of a short resting culture period prior to infusion is necessary in order to achieve in vivo alloreactivity identical to the alloreactivity observed with fresh T cells. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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