Lymphoid origin of intrinsically activated plasmacytoid dendritic cells in mice.
Alessandra Machado AraujoJoseph D DekkerKendra GarrisonZhe SuCatherine RheeZicheng HuBum-Kyu LeeDaniel OsorioJiwon LeeVishwanath R IyerLauren I R EhrlichGeorge GeorgiouGregory IppolitoStephen YiHaley O TuckerPublished in: eLife (2024)
We identified a novel mouse plasmacytoid dendritic cell (pDC) lineage derived from the common lymphoid progenitors (CLPs) that is dependent on expression of Bcl11a . These CLP-derived pDCs, which we refer to as 'B-pDCs', have a unique gene expression profile that includes hallmark B cell genes, normally not expressed in conventional pDCs. Despite expressing most classical pDC markers such as SIGLEC-H and PDCA1, B-pDCs lack IFN-α secretion, exhibiting a distinct inflammatory profile. Functionally, B-pDCs induce T cell proliferation more robustly than canonical pDCs following Toll-like receptor 9 (TLR9) engagement. B-pDCs, along with another homogeneous subpopulation of myeloid-derived pDCs, display elevated levels of the cell surface receptor tyrosine kinase AXL, mirroring human AXL + transitional DCs in function and transcriptional profile. Murine B-pDCs therefore represent a phenotypically and functionally distinct CLP-derived DC lineage specialized in T cell activation and previously not described in mice.
Keyphrases
- dendritic cells
- tyrosine kinase
- toll like receptor
- immune response
- regulatory t cells
- cell proliferation
- inflammatory response
- epidermal growth factor receptor
- cell surface
- nuclear factor
- poor prognosis
- endothelial cells
- type diabetes
- single cell
- social media
- cell cycle
- dna methylation
- insulin resistance
- pi k akt
- signaling pathway