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Published on: May 6, 2019
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CD5 expression by dendritic cells directs T cell immunity and sustains immunotherapy responses
Mingyu He1, Kate Roussak1, Feiyang Ma2
1Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA.
Science (New York, N.Y.)
|February 16, 2023
Summary
CD5 expression on dendritic cells (DCs) is crucial for effective antitumor immunity and immunotherapy. Activating CD5 on DCs enhances T cell responses and improves survival in patients undergoing immune checkpoint blockade therapy.
Area of Science:
- Immunology
- Oncology
- Cell Biology
Background:
- Dendritic cells (DCs) are key regulators of antitumor immune responses.
- Immune checkpoint blockade (ICB) therapy efficacy relies on T cell activation.
- The role of specific DC subtypes and surface markers in ICB therapy remains incompletely understood.
Purpose of the Study:
- To investigate the role of CD5 expression on dendritic cells (DCs) in melanoma and its impact on immune checkpoint blockade (ICB) therapy.
- To determine the mechanistic link between CD5+ DCs, T cell responses, and therapeutic outcomes.
Main Methods:
- Analysis of CD1c+CD5+ DC populations in melanoma lymph nodes.
- Correlation of DC-CD5 expression with patient survival.
- In vivo studies involving DC activation and T cell deletion to assess ICB therapy response.
Main Results:
- Reduced CD1c+CD5+ DCs observed in melanoma-affected lymph nodes.
- CD5 expression on DCs positively correlated with patient survival.
- Activating CD5 on DCs enhanced T cell priming and improved survival post-ICB.
- Low IL-6 promoted CD5+ DC differentiation during ICB therapy.
- CD5 on DCs is essential for generating protective T helper and CD8+ T cells.
Conclusions:
- CD5+ dendritic cells are critical for effective antitumor immunity.
- CD5+ DCs are essential components for optimal immune checkpoint blockade therapy outcomes.
- Targeting or enhancing CD5+ DC function may represent a therapeutic strategy for melanoma.
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