[HTML][HTML] A committed tissue-resident memory T cell precursor within the circulating CD8+ effector T cell pool

L Kok, FE Dijkgraaf, J Urbanus, K Bresser… - Journal of Experimental …, 2020 - rupress.org
L Kok, FE Dijkgraaf, J Urbanus, K Bresser, DW Vredevoogd, RF Cardoso, L Perié
Journal of Experimental Medicine, 2020rupress.org
An increasing body of evidence emphasizes the role of tissue-resident memory T cells (T
RM) in the defense against recurring pathogens and malignant neoplasms. However, little is
known with regard to the origin of these cells and their kinship to other CD8+ T cell
compartments. To address this issue, we followed the antigen-specific progeny of individual
naive CD8+ T cells to the T effector (T EFF), T circulating memory (T CIRCM), and T RM
pools by lineage-tracing and single-cell transcriptome analysis. We demonstrate that a …
An increasing body of evidence emphasizes the role of tissue-resident memory T cells (T RM) in the defense against recurring pathogens and malignant neoplasms. However, little is known with regard to the origin of these cells and their kinship to other CD8+ T cell compartments. To address this issue, we followed the antigen-specific progeny of individual naive CD8+ T cells to the T effector (T EFF), T circulating memory (T CIRCM), and T RM pools by lineage-tracing and single-cell transcriptome analysis. We demonstrate that a subset of T cell clones possesses a heightened capacity to form T RM, and that enriched expression of T RM–fate-associated genes is already apparent in the circulating T EFF offspring of such clones. In addition, we demonstrate that the capacity to generate T RM is permanently imprinted at the clonal level, before skin entry. Collectively, these data provide compelling evidence for early stage T RM fate decisions and the existence of committed T RM precursor cells in the circulatory T EFF compartment.
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