Hippo/Mst signalling couples metabolic state and immune function of CD8α+ dendritic cells

Xingrong Du, Jing Wen, Yanyan Wang, Peer W. F. Karmaus, Alireza Khatamian, Haiyan Tan, Yuxin Li, Cliff Guy, Thanh-Long M. Nguyen, Yogesh Dhungana, Geoffrey Neale, Junmin Peng, Jiyang Yu () and Hongbo Chi ()
Additional contact information
Xingrong Du: St Jude Children’s Research Hospital
Jing Wen: St Jude Children’s Research Hospital
Yanyan Wang: St Jude Children’s Research Hospital
Peer W. F. Karmaus: St Jude Children’s Research Hospital
Alireza Khatamian: St Jude Children’s Research Hospital
Haiyan Tan: St Jude Children’s Research Hospital
Yuxin Li: St Jude Children’s Research Hospital
Cliff Guy: St Jude Children’s Research Hospital
Thanh-Long M. Nguyen: St Jude Children’s Research Hospital
Yogesh Dhungana: St Jude Children’s Research Hospital
Geoffrey Neale: St Jude Children’s Research Hospital
Junmin Peng: St Jude Children’s Research Hospital
Jiyang Yu: St Jude Children’s Research Hospital
Hongbo Chi: St Jude Children’s Research Hospital

Nature, 2018, vol. 558, issue 7708, 141-145

Abstract: Abstract Dendritic cells orchestrate the crosstalk between innate and adaptive immunity. CD8α+ dendritic cells present antigens to CD8+ T cells and elicit cytotoxic T cell responses to viruses, bacteria and tumours 1 . Although lineage-specific transcriptional regulators of CD8α+ dendritic cell development have been identified 2 , the molecular pathways that selectively orchestrate CD8α+ dendritic cell function remain elusive. Moreover, metabolic reprogramming is important for dendritic cell development and activation3,4, but metabolic dependence and regulation of dendritic cell subsets are largely uncharacterized. Here we use a data-driven systems biology algorithm (NetBID) to identify a role of the Hippo pathway kinases Mst1 and Mst2 (Mst1/2) in selectively programming CD8α+ dendritic cell function and metabolism. Our NetBID analysis reveals a marked enrichment of the activities of Hippo pathway kinases in CD8α+ dendritic cells relative to CD8α− dendritic cells. Dendritic cell-specific deletion of Mst1/2—but not Lats1 and Lats2 (Lats1/2) or Yap and Taz (Yap/Taz), which mediate canonical Hippo signalling—disrupts homeostasis and function of CD8+ T cells and anti-tumour immunity. Mst1/2-deficient CD8α+ dendritic cells are impaired in presentation of extracellular proteins and cognate peptides to prime CD8+ T cells, while CD8α− dendritic cells that lack Mst1/2 have largely normal function. Mechanistically, compared to CD8α− dendritic cells, CD8α+ dendritic cells exhibit much stronger oxidative metabolism and critically depend on Mst1/2 signalling to maintain bioenergetic activities and mitochondrial dynamics for their functional capacities. Further, selective expression of IL-12 by CD8α+ dendritic cells depends on Mst1/2 and the crosstalk with non-canonical NF-κB signalling. Our findings identify Mst1/2 as selective drivers of CD8α+ dendritic cell function by integrating metabolic activity and cytokine signalling, and highlight that the interplay between immune signalling and metabolic reprogramming underlies the unique functions of dendritic cell subsets.

Date: 2018
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DOI: 10.1038/s41586-018-0177-0

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