CD8+ T Cells of Tc2 Phenotype Mediate a GVL Effect and Prevent Marrow Rejection

• Published in: Vox sanguinis Vol. 74; no. S2; pp. 331 - 340
• Main Authors: Fowler, D.H., Gress, R.E.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Oxford, UK Blackwell Publishing Ltd 01-06-1998; Blackwell; S. Karger AG
• Subjects: AIDS/HIV; Anesthesia. Intensive care medicine. Transfusions. Cell therapy and gene therapy; Animals; Biological and medical sciences; Bone Marrow Transplantation - immunology; Bone marrow, stem cells transplantation. Graft versus host reaction; Graft Rejection - immunology; Graft Rejection - prevention & control; Graft vs Tumor Effect - immunology; Humans; Interleukin-10 - metabolism; Interleukin-4 - metabolism; Interleukin-5 - metabolism; Lymphocyte Depletion; Lymphokines - metabolism; Medical sciences; Mice; Models, Immunological; Phenotype; Radiation Chimera; T-Lymphocytes, Cytotoxic - immunology; T-Lymphocytes, Cytotoxic - metabolism; T-Lymphocytes, Cytotoxic - transplantation; Th1 Cells - immunology; Th1 Cells - metabolism; Th2 Cells - immunology; Th2 Cells - metabolism; Transfusions. Complications. Transfusion reactions. Cell and gene therapy; Graft versus leukemia reaction; Animal model; Rodentia; Homograft; Graft versus host reaction; Review; Cell subpopulation; Allogeneic system; Prevention; Vertebrata; Mammalia; Mouse; T-Lymphocyte; Bone marrow; Graft
• ISSN: 0042-9007; 1423-0410
• DOI: 10.1111/j.1423-0410.1998.tb05439.x

Donor T cells mediate both beneficial and detrimental immune reactions in the setting of allogeneic BMT (alloBMT). T cells mediate the GVL effect and prevent marrow rejection, but also induce GVHD. In an attempt to favorably influence the balance of these allogeneic responses, we have evaluated the effect of donor CD4+, Thl/Th2 and CD8+, Tcl/Tc2 functional T cell subsets in murine marrow transplantation models. Our studies have identified the CD8+Tc2 population (which is a cytolytic effector secreting the type II cytokines IL‐4, IL‐5, and IL‐10) as a subset capable of mediating the GVL effect and preventing marrow rejection with reduced GVHD. We have also shown that the Tc2 subset can be generated in humans. These studies indicate that administration of donor CD8+ T cells of Tc2 phenotype represents a strategy for improving alloBMT outcome.