Lymphatic endothelial cells prime naïve CD8+ T cells into memory cells under steady-state conditions

Efthymia Vokali, Shann S. Yu, Sachiko Hirosue, Marcela Rinçon-Restrepo, Fernanda V. Duraes, Stefanie Scherer, Patricia Corthésy-Henrioud, Witold W. Kilarski, Anna Mondino, Dietmar Zehn, Stéphanie Hugues, Melody A. Swartz

Research output: Contribution to journalArticlepeer-review

Abstract

Lymphatic endothelial cells (LECs) chemoattract naïve T cells and promote their survival in the lymph nodes, and can cross-present antigens to naïve CD8+ T cells to drive their proliferation despite lacking key costimulatory molecules. However, the functional consequence of LEC priming of CD8+ T cells is unknown. Here, we show that while many proliferating LEC-educated T cells enter early apoptosis, the remainders comprise a long-lived memory subset, with transcriptional, metabolic, and phenotypic features of central memory and stem cell-like memory T cells. In vivo, these memory cells preferentially home to lymph nodes and display rapid proliferation and effector differentiation following memory recall, and can protect mice against a subsequent bacterial infection. These findings introduce a new immunomodulatory role for LECs in directly generating a memory-like subset of quiescent yet antigen-experienced CD8+ T cells that are long-lived and can rapidly differentiate into effector cells upon inflammatory antigenic challenge.

Original languageEnglish
Article number538
JournalNature Communications
Volume11
Issue number1
DOIs
Publication statusPublished - Dec 1 2020

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

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