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2018 ; 41
(6
): 274-283
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Adoptive Transfer of Interleukin-21-stimulated Human CD8+ T Memory Stem Cells
Efficiently Inhibits Tumor Growth
#MMPMID29864078
Chen Y
; Yu F
; Jiang Y
; Chen J
; Wu K
; Chen X
; Lin Y
; Zhang H
; Li L
; Zhang Y
J Immunother
2018[Jul]; 41
(6
): 274-283
PMID29864078
show ga
Memory stem T (TSCM) cells, a new subset of memory T cells with self-renewal and
multipotent capacities, are considered as a promising candidates for adoptive
cellular therapy. However, the low proportion of human TSCM cells in total CD8 T
cells limits their utility. Here, we aimed to induce human CD8 TSCM cells by
stimulating naive precursors with interleukin-21 (IL-21). We found that IL-21
promoted the generation of TSCM cells, described as
CD45RACD45ROCD62LCCR7CD122CD95 cells, with a higher efficiency than that observed
with other common ?-chain cytokines. Upon adoptive transfer into an A375 melanoma
mouse model, these lymphocytes mediated much stronger antitumor responses.
Further mechanistic analysis revealed that IL-21 activated the Janus kinase
signal transducer and activator of transcription 3 pathway by upregulating signal
transducer and activator of transcription 3 phosphorylation and consequently
promoting the expression of T-bet and suppressor of cytokine signaling 1, but
decreasing the expression of eomesodermin and GATA binding protein 3. Our
findings provide novel insights into the generation of human CD8 TSCM cells and
reveal a novel potential clinical application of IL-21.