Cutting Edge: CD8+ T Cell Priming in the Absence of NK Cells Leads to Enhanced Memory Responses
Open Access
- 15 March 2011
- journal article
- Published by The American Association of Immunologists in The Journal of Immunology
- Vol. 186 (6), 3304-3308
- https://doi.org/10.4049/jimmunol.1004122
Abstract
It is uncertain whether NK cells modulate T cell memory differentiation. By using a genetic model that allows the selective depletion of NK cells, we show in this study that NK cells shape CD8+ T cell fate by killing recently activated CD8+ T cells in an NKG2D- and perforin-dependent manner. In the absence of NK cells, the differentiation of CD8+ T cells is strongly biased toward a central memory T cell phenotype. Although, on a per-cell basis, memory CD8+ T cells generated in the presence or the absence of NK cells have similar functional features and recall capabilities, NK cell deletion resulted in a significantly higher number of memory Ag-specific CD8+ T cells, leading to more effective control of tumors carrying model Ags. The enhanced memory responses induced by the transient deletion of NK cells may provide a rational basis for the design of new vaccination strategies.Keywords
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