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5-lipoxygenase expression in dendritic cells generated from CD34+ hematopoietic progenitors and in lymphoid organs

Spanbroek, Rainer ; Hildner, Markus ; Steinhilber, Dieter ; Fusenig, Norbert ; Yoneda, Kozo ; Samuelsson, Olof Rådmark, Bengt ; Habenicht, Andreas J.R.

Blood, 2000-12, Vol.96 (12), p.3857-3865 [同儕審閱期刊]

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5-lipoxygenase expression in dendritic cells generated from CD34+ hematopoietic progenitors and in lymphoid organs
著者: Spanbroek, Rainer ; Hildner, Markus ; Steinhilber, Dieter ; Fusenig, Norbert ; Yoneda, Kozo ; Samuelsson, Olof Rådmark, Bengt ; Habenicht, Andreas J.R.
主題: Analysis of the immune response. Humoral and cellular immunity ; Antigens, CD34 - analysis ; Arachidonate 5-Lipoxygenase - biosynthesis ; Arachidonate 5-Lipoxygenase - genetics ; Arachidonate 5-Lipoxygenase - metabolism ; Arachidonic Acid - pharmacology ; Biological and medical sciences ; Calcimycin - pharmacology ; Cell Differentiation - drug effects ; Cell interactions ; Cell Lineage ; Chemotactic Factors - biosynthesis ; Cytokines - pharmacology ; Dendritic Cells - cytology ; Dendritic Cells - enzymology ; Fetal Blood - cytology ; Flow Cytometry ; Fundamental and applied biological sciences. Psychology ; Fundamental immunology ; Hematopoietic Stem Cells - cytology ; Hematopoietic Stem Cells - immunology ; HLA-DR Antigens ; Humans ; Hydroxyeicosatetraenoic Acids - biosynthesis ; Immunobiology ; Immunohistochemistry ; Immunophenotyping ; Ionophores - pharmacology ; Leukotriene B4 - biosynthesis ; Lymph Nodes - enzymology ; Lymphoid Tissue - cytology ; Lymphoid Tissue - immunology ; Macrophages - enzymology ; Palatine Tonsil - enzymology
所屬期刊: Blood, 2000-12, Vol.96 (12), p.3857-3865
描述: The 5-lipoxygenase (5-LO) pathway in human CD34+ hematopoietic progenitor cells, which were induced to differentiate into dendritic cells (DCs) by cytokines in vitro and in DCs of lymphoid tissues in situ, was examined. Extracts prepared from HPCs contained low levels of 5-LO or 5-LO–activating protein. Granulocyte-macrophage colony-stimulating factor (GM-CSF) plus tumor necrosis factor–α (TNF-α) promoted DC differentiation and induced a strong rise in 5-LO and FLAP expression. Fluorescence-activated cell sorter (FACS) analyses identified a major DC population coexpressing human leukocyte antigen (HLA)-DR/CD80 and monocytic or Langerhans cell markers. Transforming growth factor–β1 (TGF-β–1), added to support DC maturation, strongly promoted the appearance of CD1a+/Lag+ Langerhans-type cells as well as mature CD83+ DCs. TGF-β–1 further increased 5-LO and FLAP expression, recruited additional cells into the 5-LO+DC population, and promoted production of 5-hydroxyeicosatetraenoic acid and leukotriene B4 in response to calcium (Ca++) ionophore A23187. These in vitro findings were corroborated by 5-LO expression in distinct DC phenotypes in vivo. Scattered 5-LO and FLAP in situ hybridization signals were recorded in cells of paracortical T-lymphocyte–rich areas and germinal centers (GCs) of lymph nodes (LNs) and tonsil and in cells of mucosae overlying the Waldeyer tonsillar ring. 5-LO protein localized to both CD1a+ immature DCs and to CD83+ mature interdigitating DCs of T-lymphocyte–rich areas of LNs and tonsil. As DCs have the unique ability to initiate naive lymphocyte activation, our data support the hypothesis that leukotrienes act at proximal steps of adaptive immune responses.
出版者: Washington, DC: Elsevier Inc
語言: 英文
識別號: ISSN: 0006-4971
EISSN: 1528-0020
DOI: 10.1182/blood.V96.12.3857
PMID: 11090070
資源來源: Alma/SFX Local Collection

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5-lipoxygenase expression in dendritic cells generated from CD34+ hematopoietic progenitors and in lymphoid organs

Spanbroek, Rainer ; Hildner, Markus ; Steinhilber, Dieter ; Fusenig, Norbert ; Yoneda, Kozo ; Samuelsson, Olof Rådmark, Bengt ; Habenicht, Andreas J.R.

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