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© Research
Publication : The Journal of experimental medicine

Zinc finger transcription factor zDC is a negative regulator required to prevent activation of classical dendritic cells in the steady state.

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in The Journal of experimental medicine - 27 Aug 2012

Meredith MM, Liu K, Kamphorst AO, Idoyaga J, Yamane A, Guermonprez P, Rihn S, Yao KH, Silva IT, Oliveira TY, Skokos D, Casellas R, Nussenzweig MC

Link to Pubmed [PMID] – 22851594

Link to DOI – 10.1084/jem.20121003

J Exp Med 2012 Aug; 209(9): 1583-93

Classical dendritic cells (cDCs) process and present antigens to T cells. Under steady-state conditions, antigen presentation by cDCs induces tolerance. In contrast, during infection or inflammation, cDCs become activated, express higher levels of cell surface MHC molecules, and induce strong adaptive immune responses. We recently identified a cDC-restricted zinc finger transcription factor, zDC (also known as Zbtb46 or Btbd4), that is not expressed by other immune cell populations, including plasmacytoid DCs, monocytes, or macrophages. We define the zDC consensus DNA binding motif and the genes regulated by zDC using chromatin immunoprecipitation and deep sequencing. By deleting zDC from the mouse genome, we show that zDC is primarily a negative regulator of cDC gene expression. zDC deficiency alters the cDC subset composition in the spleen in favor of CD8(+) DCs, up-regulates activation pathways in steady-state cDCs, including elevated MHC II expression, and enhances cDC production of vascular endothelial growth factor leading to increased vascularization of skin-draining lymph nodes. Consistent with these observations, zDC protein expression is rapidly down-regulated after TLR stimulation. Thus, zDC is a TLR-responsive, cDC-specific transcriptional repressor that is in part responsible for preventing cDC maturation in the steady state.