Adoptive immunotherapy of disseminated leukemia with TCR-transduced, CD8+ T cells expressing a known endogenous TCR.
Adoptive T-cell immunotherapy has shown promise in the treatment of human malignancies, but the challenge of isolating T cells with high avidity for tumor antigens in each patient has limited application of this approach. The transfer into T cells of T-cell receptor (TCR) genes encoding high-affinity TCRs recognizing defined tumor-associated antigens can potentially circumvent this obstacle. Using a well-characterized murine model of adoptive T-cell immunotherapy for widely disseminated leukemia, we demonstrate that TCR gene-modified T cells can cure mice of disseminated tumor. One goal of such adoptive therapy is to establish a persistent memory response to prevent recurrence; however, long-term function of transferred TCR-transduced T cells is limited due to reduced expression of the introduced TCR in vivo in quiescent resting T cells. However, by introducing the TCR into a cell with a known endogenous specificity, activation of these T cells by stimulation through the endogenous TCR can be used to increase expression of the introduced TCR, potentially providing a strategy to increase the total number of tumor-reactive T cells in the host and restore more potent antitumor activity.
Dossett
Michelle L
ML
Department of Immunology, University of Washington School of Medicine, Seattle, Washington 98195, USA.
Teague
Ryan M
RM
Schmitt
Thomas M
TM
Tan
Xiaoxia
X
Cooper
Laurence Jn
LJ
Pinzon
Cristina
C
Greenberg
Philip D
PD
D000818:Animals; D018414:CD8-Positive T-Lymphocytes / Q000276:immunology*; D005822:Genetic Vectors; D016219:Immunotherapy, Adoptive; D007942:Leukemia, Experimental / Q000276:immunology / Q000628:therapy*; D051379:Mice; D008810:Mice, Inbred C57BL; D011948:Receptors, Antigen, T-Cell / Q000235:genetics*; D014161:Transduction, Genetic; D014162:Transfection
D011948:Receptors, Antigen, T-Cell