CD5 expression by dendritic cells directs T cell immunity and sustains immunotherapy responses

  • Mingyu He
  • , Kate Roussak
  • , Feiyang Ma
  • , Nicholas Borcherding
  • , Vince Garin
  • , Mike White
  • , Charles Schutt
  • , Trine I. Jensen
  • , Yun Zhao
  • , Courtney A. Iberg
  • , Kairav Shah
  • , Himanshi Bhatia
  • , Daniel Korenfeld
  • , Sabrina Dinkel
  • , Judah Gray
  • , Alina Ulezko Antonova
  • , Stephen Ferris
  • , David Donermeyer
  • , Cecilia Lindestam Arlehamn
  • , Matthew M. Gubin
  • Jingqin Luo, Laurent Gorvel, Matteo Pellegrini, Alessandro Sette, Thomas Tung, Rasmus Bak, Robert L. Modlin, Ryan C. Fields, Robert D. Schreiber, Paul M. Allen, Eynav Klechevsky

Research output: Contribution to journalArticlepeer-review

Abstract

The induction of proinflammatory T cells by dendritic cell (DC) subtypes is critical for antitumor responses and effective immune checkpoint blockade (ICB) therapy. Here, we show that human CD1c+CD5+ DCs are reduced in melanoma-affected lymph nodes, with CD5 expression on DCs correlating with patient survival. Activating CD5 on DCs enhanced T cell priming and improved survival after ICB therapy. CD5+ DC numbers increased during ICB therapy, and low interleukin-6 (IL-6) concentrations promoted their de novo differentiation. Mechanistically, CD5 expression by DCs was required to generate optimally protective CD5hi T helper and CD8+ T cells; further, deletion of CD5 from T cells dampened tumor elimination in response to ICB therapy in vivo. Thus, CD5+ DCs are an essential component of optimal ICB therapy.

Original languageEnglish
Article numbereabg2752
JournalScience
Volume379
Issue number6633
DOIs
StatePublished - Feb 17 2023

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