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

Author:

He Mingyu1ORCID,Roussak Kate1ORCID,Ma Feiyang2ORCID,Borcherding Nicholas1ORCID,Garin Vince1,White Mike1ORCID,Schutt Charles1ORCID,Jensen Trine I.3ORCID,Zhao Yun1ORCID,Iberg Courtney A.1ORCID,Shah Kairav1ORCID,Bhatia Himanshi1ORCID,Korenfeld Daniel1ORCID,Dinkel Sabrina1ORCID,Gray Judah1ORCID,Ulezko Antonova Alina1ORCID,Ferris Stephen1ORCID,Donermeyer David1ORCID,Lindestam Arlehamn Cecilia4ORCID,Gubin Matthew M.1ORCID,Luo Jingqin5ORCID,Gorvel Laurent1ORCID,Pellegrini Matteo2ORCID,Sette Alessandro46ORCID,Tung Thomas7ORCID,Bak Rasmus38,Modlin Robert L.910ORCID,Fields Ryan C.4ORCID,Schreiber Robert D.1ORCID,Allen Paul M.1,Klechevsky Eynav1ORCID

Affiliation:

1. Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA.

2. Molecular Cell and Developmental Biology at University of California, Los Angeles (UCLA), Los Angeles, CA 90095, USA.

3. Department of Biomedicine, Aarhus University, 8000 Aarhus C, Denmark.

4. Center for Infectious Disease and Vaccine Research, La Jolla Institute for Immunology, La Jolla, CA 92037, USA.

5. Department of Surgery, Washington University School of Medicine, St. Louis, MO 63110, USA.

6. Department of Medicine, Division of Infectious Diseases and Global Public Health, University of California San Diego (UCSD), La Jolla, CA 92037, USA.

7. Department of Surgery, Division of Plastic and Reconstructive Surgery, Washington University School of Medicine, St. Louis, MO 63110, USA.

8. Aarhus Institute of Advanced Studies (AIAS), Aarhus University, 8000 Aarhus C, Denmark.

9. Division of Dermatology, Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095, USA.

10. Department of Microbiology, Immunology and Molecular Genetics, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095, USA.

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 CD5 hi 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.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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