PT - JOURNAL ARTICLE AU - Tsujimura, Hideki AU - Tamura, Tomohiko AU - Ozato, Keiko TI - Cutting Edge: IFN Consensus Sequence Binding Protein/IFN Regulatory Factor 8 Drives the Development of Type I IFN-Producing Plasmacytoid Dendritic Cells AID - 10.4049/jimmunol.170.3.1131 DP - 2003 Feb 01 TA - The Journal of Immunology PG - 1131--1135 VI - 170 IP - 3 4099 - http://www.jimmunol.org/content/170/3/1131.short 4100 - http://www.jimmunol.org/content/170/3/1131.full SO - J. Immunol.2003 Feb 01; 170 AB - IFN consensus sequence binding protein (ICSBP/IFN regulatory factor 8) is a hematopoietic cell-specific transcription factor essential for the generation of CD8α+ dendritic cells (DCs). We found that ICSBP−/− mice lack B220+CD11b− plasmacytoid DCs (pDCs) in addition to CD8α+ DCs. Although ICSBP−/− mice have B220−CD11b+ myeloid DCs (mDCs), they fail to mature upon Toll-like receptor signaling. Accordingly, ICSBP−/− bone marrow progenitor cells were Tefective in generating pDCs in the fms-like tyrosine kinase 3 ligand-based culture system and mDCs generated in this system were defective in maturation. We demonstrate that introduction of ICSBP rescues the development of pDCs from −/− bone marrow progenitors. ICSBP also restored the ability of both pDCs and mDCs to mature after Toll-like receptor signals. ICSBP-restored DCs produced IFN-α and IL-12p40 in a DC subset-selective manner with the amounts comparable to those by +/+ DCs. Together, ICSBP is essential for early pDC development and final maturation of both pDCs and mDCs.