TY - JOUR
T1 - The stoichiometric production of IL-2 and IFN-γmRNA defines memory T cells that can self-renew after adoptive transfer in humans
AU - Wang, Anran
AU - Chandran, Smita
AU - Shah, Syed A.
AU - Chiu, Yu
AU - Paria, Biman C.
AU - Aghamolla, Tamara
AU - Alvarez-Downing, Melissa M.
AU - Lee, Chyi Chia Richard
AU - Singh, Sanmeet
AU - Li, Thomas
AU - Dudley, Mark E.
AU - Restifo, Nicholas P.
AU - Rosenberg, Steven A.
AU - Kammula, Udai S.
PY - 2012/8/29
Y1 - 2012/8/29
N2 - Adoptive immunotherapy using ex vivo-expanded tumor-reactive lymphocytes can mediate durable cancer regression in selected melanoma patients. Analyses of these trials have associated the in vivo engraftment ability of the transferred cells with their antitumor efficacy. Thus, there is intensive clinical interest in the prospective isolation of tumor-specific T cells that can reliably persist after transfer. Animal studies have suggested that central memory CD8+ T cells (TCM) have divergent capabilities including effector differentiation to target antigen and stem cell-like self-renewal that enable long-term survival after adoptive transfer. We sought to isolate human melanoma-specific TCM to define their in vivo fate and function after autologous therapeutic transfer to metastatic patients. To facilitate the high-throughput identification of these rare cells from patients, we report that TCM have a defined stoichiometric production of interleukin-2 (IL-2) and interferon-γ (IFN-γ) mRNA after antigen stimulation. Melanoma-specific T cells screened for high relative IL-2 production had a TCM phenotype and superior in vitro proliferative capacity compared to cells with low IL-2 production. To investigate in vivo effector function and self-renewal capability, we allowed melanoma-specific TCM to undergo in vitro expansion and differentiation into lytic effector clones and then adoptively transferred them back into their hosts. These clones targeted skin melanocytes in all five patients and persisted long term and reacquired parental TCM attributes in four patients after transfer. These findings demonstrate the favorable engraftment fitness for human TCM-derived clones, but further efforts to improve their antitumor efficacy are still necessary.
AB - Adoptive immunotherapy using ex vivo-expanded tumor-reactive lymphocytes can mediate durable cancer regression in selected melanoma patients. Analyses of these trials have associated the in vivo engraftment ability of the transferred cells with their antitumor efficacy. Thus, there is intensive clinical interest in the prospective isolation of tumor-specific T cells that can reliably persist after transfer. Animal studies have suggested that central memory CD8+ T cells (TCM) have divergent capabilities including effector differentiation to target antigen and stem cell-like self-renewal that enable long-term survival after adoptive transfer. We sought to isolate human melanoma-specific TCM to define their in vivo fate and function after autologous therapeutic transfer to metastatic patients. To facilitate the high-throughput identification of these rare cells from patients, we report that TCM have a defined stoichiometric production of interleukin-2 (IL-2) and interferon-γ (IFN-γ) mRNA after antigen stimulation. Melanoma-specific T cells screened for high relative IL-2 production had a TCM phenotype and superior in vitro proliferative capacity compared to cells with low IL-2 production. To investigate in vivo effector function and self-renewal capability, we allowed melanoma-specific TCM to undergo in vitro expansion and differentiation into lytic effector clones and then adoptively transferred them back into their hosts. These clones targeted skin melanocytes in all five patients and persisted long term and reacquired parental TCM attributes in four patients after transfer. These findings demonstrate the favorable engraftment fitness for human TCM-derived clones, but further efforts to improve their antitumor efficacy are still necessary.
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U2 - 10.1126/scitranslmed.3004306
DO - 10.1126/scitranslmed.3004306
M3 - Article
C2 - 22932225
AN - SCOPUS:84865808327
SN - 1946-6234
VL - 4
JO - Science translational medicine
JF - Science translational medicine
IS - 149
M1 - 149ra120
ER -