[HTML][HTML] Functional specialty of CD40 and dendritic cell surface lectins for exogenous antigen presentation to CD8+ and CD4+ T cells

W Yin, L Gorvel, S Zurawski, D Li, L Ni, D Duluc… - …, 2016 - thelancet.com
W Yin, L Gorvel, S Zurawski, D Li, L Ni, D Duluc, K Upchurch, JR Kim, C Gu, R Ouedraogo
EBioMedicine, 2016thelancet.com
Dendritic cells (DCs) are major antigen-presenting cells that can efficiently prime and cross-
prime antigen-specific T cells. Delivering antigen to DCs via surface receptors is thus an
appealing strategy to evoke cellular immunity. Nonetheless, which DC surface receptor to
target to yield the optimal CD8+ and CD4+ T cell responses remains elusive. Herein, we
report the superiority of CD40 over 9 different lectins and scavenger receptors at evoking
antigen-specific CD8+ T cell responses. However, lectins (eg, LOX-1 and Dectin-1) were …
Abstract
Dendritic cells (DCs) are major antigen-presenting cells that can efficiently prime and cross-prime antigen-specific T cells. Delivering antigen to DCs via surface receptors is thus an appealing strategy to evoke cellular immunity. Nonetheless, which DC surface receptor to target to yield the optimal CD8+ and CD4+ T cell responses remains elusive. Herein, we report the superiority of CD40 over 9 different lectins and scavenger receptors at evoking antigen-specific CD8+ T cell responses. However, lectins (e.g., LOX-1 and Dectin-1) were more efficient than CD40 at eliciting CD4+ T cell responses. Common and distinct patterns of subcellular and intracellular localization of receptor-bound αCD40, αLOX-1 and αDectin-1 further support their functional specialization at enhancing antigen presentation to either CD8+ or CD4+ T cells. Lastly, we demonstrate that antigen targeting to CD40 can evoke potent antigen-specific CD8+ T cell responses in human CD40 transgenic mice. This study provides fundamental information for the rational design of vaccines against cancers and viral infections.
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