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Multicolor flow cytometric analysis of Siglec-H expression on mouse splenocytes and thymocytes. BALB/c mouse splenic leucocytes (Top Plots; preincubated with Purified Rat Anti-Mouse CD16/CD32 antibody/Mouse BD Fc Block™, Cat. No. 553141/553142) or thymocytes (Bottom Plots) were stained with BD Horizon™ BV421 Rat Anti-Mouse CD45R/B220 antibody (Cat. No. 562922) and with either BD Horizon™ R718 Rat IgG1, κ Isotype Control (Cat. No. 566948; Left Plots) or BD Horizon™ R718 Rat Anti-Mouse Siglec-H antibody (Cat. No. 567840; Right Plots) at 0.25 μg/test. BD Via-Probe™ Cell Viability 7-AAD Solution (Cat. No. 555815/555816) was added to cells right before analysis. The bivariate pseudocolor density plots showing the correlated expression of Siglec-H (or Ig Isotype control staining) versus CD45R/B220 were derived from gated events with the forward and side light-scatter characteristics of viable (7-AAD-negative) leucocytes. Flow cytometry and data analysis were performed using a BD FACSCelesta™ Cell Analyzer System and FlowJo™ software. Data shown on this Technical Data Sheet are not lot specific.
BD Horizon™ R718 Rat Anti-Mouse Siglec-H
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The 551 monoclonal antibody specifically recognizes Siglec-H, a type I transmembrane glycoprotein that is encoded by Siglech (Sialic acid binding Ig-like lectin H). Siglec-H contains two immunoglobulin domains in its extracellular region and a cytoplasmic domain that lacks tyrosine-based signaling motifs unlike other CD33-related Siglec-like molecules. Siglec-H is expressed on progenitors of plasmacytoid dendritic cells (pDCs) and depends on DAP12 for cell surface expression and intracellular signaling function. In addition to its expression on plasmacytoid dendritic cells (pDC), Siglec-H may also be expressed by splenic marginal zone macrophages, medullary macrophages in lymph nodes, and microglia. Siglec-H may regulate the production of type I interferons (IFN-I) by pDCs and other cell types. There is no clear human ortholog for mouse Siglec-H.
Development References (7)
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Blasius A, Vermi W, Krug A, Facchetti F, Cella M, Colonna M. A cell-surface molecule selectively expressed on murine natural interferon-producing cells that blocks secretion of interferon-alpha.. Blood. 2004; 103(11):4201-6. (Biology). View Reference
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Blasius AL, Giurisato E, Cella M, Schreiber RD, Shaw AS, Colonna M. Bone marrow stromal cell antigen 2 is a specific marker of type I IFN-producing cells in the naive mouse, but a promiscuous cell surface antigen following IFN stimulation.. J Immunol. 2006; 177(5):3260-5. (Biology). View Reference
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Koda Y, Nakamoto N, Chu PS, et al. Plasmacytoid dendritic cells protect against immune-mediated acute liver injury via IL-35.. J Clin Invest. 2019; 129(8):3201-3213. (Clone-specific: Flow cytometry). View Reference
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Schmitt H, Sell S, Koch J, et al. Siglec-H protects from virus-triggered severe systemic autoimmunity. J Exp Med. 2016; 213(8):1627-1644. (Clone-specific). View Reference
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Swiecki M, Wang Y, Gilfillan S, Lenschow DJ, Colonna M. Cutting edge: paradoxical roles of BST2/tetherin in promoting type I IFN response and viral infection.. J Immunol. 2012; 188(6):2488-92. (Clone-specific: Flow cytometry, Fluorescence activated cell sorting). View Reference
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Uematsu T, Iizasa E, Kobayashi N, Yoshida H, Hara H. Loss of CARD9-mediated innate activation attenuates severe influenza pneumonia without compromising host viral immunity.. Sci Rep. 2015; 5:17577. (Clone-specific: Flow cytometry). View Reference
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Zhang J, Raper A, Sugita N, et al. Characterization of Siglec-H as a novel endocytic receptor expressed on murine plasmacytoid dendritic cell precursors. Blood. 2006; 107(9):3600-3608. (Biology). View Reference
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For Research Use Only. Not for use in diagnostic or therapeutic procedures.