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Blood, 1 June 2005, Vol. 105, No. 11, pp. 4407-4415. Prepublished online as a Blood First Edition Paper on February 22, 2005; DOI 10.1182/blood-2004-07-2529. This Article Full Text Full Text (PDF) Supplemental Figures All Versions of this Article: 2004-07-2529v1 105/11/4407    most recent Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Rights and Permissions Citing Articles Citing Articles via HighWire Citing Articles via CrossRef Citing Articles via Google Scholar Google Scholar Articles by Pelayo, R. Articles by Kincade, P. W. Search for Related Content PubMed PubMed Citation Articles by Pelayo, R. Articles by Kincade, P. W. Related Collections Hematopoiesis and Stem Cells Immunobiology Social Bookmarking                   What's this?  Previous Article  |  Table of Contents  |  Next Article  IMMUNOBIOLOGY Derivation of 2 categories of plasmacytoid dendritic cells in murine bone marrow Rosana Pelayo, Jun Hirose, Jiaxue Huang, Karla P. Garrett, Alessio Delogu, Meinrad Busslinger, and Paul W. Kincade From the Immunobiology and Cancer Program, Oklahoma Medical Research Foundation, Oklahoma City, OK; and the Research Institute of Molecular Pathology, Vienna, Austria. Plasmacytoid dendritic cells (pDCs) competent to make type I interferon were rigorously defined as a Ly-6C+ and CD11cLo subset of the B220+CD19- CD43+CD24Lo bone marrow (BM) Fraction A. Otherwise similar Ly6C- cells expressed the natural killer (NK) markers DX5 and NK1.1. pDCs represented a stable, discrete, and long-lived population. Stem cells and early lymphoid progenitors (ELPs), but not prolymphocytes, were effective precursors of pDCs, and their differentiation was blocked by ligation of Notch receptors. Furthermore, pDCs were present in the BM of RAG1-/-, CD127/IL-7Ra-/-, and Pax5-/- mice. pDCs in RAG1/GFP knock-in mice could be subdivided, and immunoglobulin DH-JH rearrangements, as well as transcripts for the B-lineage–related genes Pax5, mb1/CD79a, ebf, and Bcl11a, were identified only in the green fluorescent protein–positive (GFP+) pDC1 subset. All pDCs expressed terminal deoxynucleotidyl transferase (TdT), the ETS transcription factor Spi-B, the nuclear factor-B transcription factor RelB, toll-like receptor 9 (TLR9), and interferon consensus sequence binding protein (ICSBP)/interferon regulatory factor 8 (IRF-8) transcripts; lacked CD16 and granulocyte colony-stimulating factor receptor (G-CSFR); and were uniformly interleukin-7 receptor (IL-7R-) AA4.1Lo, CD27-, Flk-2Lo, c-Kit-, DX-5-, and CD11b-, while CD4 and CD8 were variable. GFP+ pDC1 subset was less potent than GFP- pDC2s in T allostimulation and production of tumor necrosis factor (TNF), interferon (IFN), and interleukin-6 (IL-6), while only pDC2s made IFN and IL-12 p70. Thus, 2 functionally specialized subsets of pDCs arise in bone marrow from progenitors that diverge from B, T, and NK lineages at an early stage. CiteULike    Connotea    Del.icio.us    Digg    Reddit    Technorati    What's this? This article has been cited by other articles: T. Matsui, J. E. 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