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Histamine inhibits neutrophil NADPH oxidase activity triggered by the lipoxin A4 receptor-specific peptide agonist Trp-Lys-Tyr-Met-Val-Met

Artikel i vetenskaplig tidskrift
Författare Åsa Betten
Claes Dahlgren
Svante Hermodsson
Kristoffer Hellstrand
Publicerad i Scand J Immunol
Volym 58
Nummer/häfte 3
Sidor 321-6
Publiceringsår 2003
Publicerad vid Institutionen för invärtesmedicin, Avdelningen för reumatologi och inflammationsforskning
Institutionen för laboratoriemedicin, Avdelningen för klinisk virologi
Sidor 321-6
Språk en
Länkar www.ncbi.nlm.nih.gov/entrez/query.f...
Ämnesord Chemotactic Factors/immunology/pharmacology, Cytoplasmic Granules/drug effects/immunology, Down-Regulation, Enzyme Inhibitors/immunology/pharmacology, Histamine/immunology/*pharmacology, Humans, N-Formylmethionine Leucyl-Phenylalanine/immunology/pharmacology, NADPH Oxidase/*antagonists & inhibitors/immunology, Neutrophils/drug effects/*enzymology/immunology, Oligopeptides/immunology/*pharmacology, Receptors, Cell Surface/*agonists/immunology, *Receptors, Formyl Peptide, *Receptors, Lipoxin, Research Support, Non-U.S. Gov't, Signal Transduction/drug effects, Superoxides/immunology/*metabolism, Tetradecanoylphorbol Acetate/immunology/pharmacology
Ämneskategorier Medicin och Hälsovetenskap

Sammanfattning

The vasoactive amine histamine is found at high concentrations in the immune and inflammatory tissues. Earlier studies have revealed that histamine regulates the nicotinamide-adenine dinucleotide phosphate (NADPH) oxidase-dependent formation of oxygen radicals by phagocytic cells. However, the effects of histamine on intracellular signal transduction mechanisms of relevance to oxidase regulation remain controversial. For this study, we investigated the effects of histamine on NADPH oxidase activity in human neutrophil granulocytes triggered by a lipoxin A4 receptor agonist [the hexapeptide Trp-Lys-Tyr-Met-Val-Met (WKYMVM), a formyl peptide receptor (FPR) agonist (the chemotactic tripeptide formylmethionyl-leucyl-phenylalanine (fMLF)) and an activator of protein kinase C (phorbol myristate acetate (PMA)]. We report that histamine, acting via H2-type histamine receptors (H2R), suppresses NADPH oxidase-dependent formation of oxygen radicals induced by WKYMVM and fMLF but not that induced by PMA. Peptide-induced mobilization of granule-localized complement receptor 3 (CR3) was unaffected by histamine suggesting that the inhibition specifically affected NADPH oxidase activation. Our data suggest that histamine downregulates FPRL1- and FPR-induced NADPH oxidase activity upstream of protein kinase C (PKC) and downstream of the separation of the peptide-induced signal into granule secretion and oxidase activation.

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