Lipopolysaccharide-induced gelatinase granule mobilization primes neutrophils for activation by galectin-3 and formylmethionyl-Leu-Phe.

Almkvist, Jenny,1971Gothenburg University,Göteborgs universitet,Institutionen för invärtesmedicin, Avdelningen för reumatologi och inflammationsforskning,Institutionen för medicinsk mikrobiologi och immunologi,Institute of Internal Medicine, Dept of Rheumatology and Inflammation Research,Institute of Medical Microbiology/Immunology (author)

We have earlier shown that galectin-3, a lactose-binding mammalian lectin that is secreted from activated macrophages, basophils, and mast cells, induces activation of the NADPH oxidase in exudated but not in peripheral blood neutrophils (A. Karlsson, P. Follin, H. Leffler, and C. Dahlgren, Blood 91:3430-3438, 1998). The alteration in responsiveness occurring during extravasation correlated with mobilization of the gelatinase and/or specific granules to the cell surface, indicating a role for mobilizable galectin-3 receptors. In this study we have investigated galectin-3-induced NADPH oxidase activation, measured as superoxide production, in lipopolysaccharide (LPS)-primed neutrophils. Upon galectin-3 challenge, the LPS-primed cells produced superoxide, both extracellularly and intracellularly. A primed extracellular response to formylmethionyl-Leu-Phe (fMLF) was also achieved. The exposure of complement receptors 1 and 3 as well as the formyl peptide receptor on the cell surface was markedly increased after LPS treatment, indicating that granule fusion with the plasma membrane had occurred. Further assessment of specific markers for neutrophil granules showed that the LPS treatment had mobilized the gelatinase granules but only a minor fraction of the specific granules. We thus suggest that the mechanism behind LPS priming lies at the level of granule (receptor) mobilization for galectin-3 as well as for fMLF.

MEDICIN OCH HÄLSOVETENSKAP Medicinska och farmaceutiska grundvetenskaper Immunologi inom det medicinska området hsv//swe
MEDICAL AND HEALTH SCIENCES Basic Medicine Immunology in the medical area hsv//eng
MEDICIN OCH HÄLSOVETENSKAP Medicinska och farmaceutiska grundvetenskaper Mikrobiologi inom det medicinska området hsv//swe
MEDICAL AND HEALTH SCIENCES Basic Medicine Microbiology in the medical area hsv//eng
Antigens
CD
physiology
Antigens
Differentiation
pharmacology
physiology
Cell Adhesion Molecules
Cytoplasmic Granules
enzymology
Galectin 3
Gelatinases
metabolism
Humans
Lipopolysaccharides
pharmacology
N-Formylmethionine Leucyl-Phenylalanine
pharmacology
NADPH Oxidase
metabolism
Neutrophil Activation
drug effects
Neutrophils
enzymology
ultrastructure

Fäldt, Jenny,1971Gothenburg University,Göteborgs universitet,Institutionen för medicinsk mikrobiologi och immunologi,Institute of Medical Microbiology/Immunology (author)
Dahlgren, Claes,1949Gothenburg University,Göteborgs universitet,Institutionen för medicinsk mikrobiologi och immunologi,Institutionen för invärtesmedicin, Avdelningen för reumatologi och inflammationsforskning,Institute of Medical Microbiology/Immunology,Institute of Internal Medicine, Dept of Rheumatology and Inflammation Research(Swepub:gu)xdahcl (author)
Leffler, HakonLund University,Lunds universitet,Avdelningen för mikrobiologi, immunologi och glykobiologi - MIG,Institutionen för laboratoriemedicin,Medicinska fakulteten,Division of Microbiology, Immunology and Glycobiology - MIG,Department of Laboratory Medicine,Faculty of Medicine(Swepub:lu)mmb-hle (author)
Karlsson, Anna,1967Gothenburg University,Göteborgs universitet,Institutionen för invärtesmedicin, Avdelningen för reumatologi och inflammationsforskning,Institute of Internal Medicine, Dept of Rheumatology and Inflammation Research(Swepub:gu)xkannb (author)
Göteborgs universitetInstitutionen för invärtesmedicin, Avdelningen för reumatologi och inflammationsforskning (creator_code:org_t)

By the author/editor: Almkvist, Jenny, ...; Fäldt, Jenny, 19 ...; Dahlgren, Claes, ...; Leffler, Hakon; Karlsson, Anna, ...

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MEDICAL AND HEALTH SCIENCES: MEDICAL AND HEAL ...; and Basic Medicine; and Immunology in th ...

MEDICAL AND HEALTH SCIENCES: MEDICAL AND HEAL ...; and Basic Medicine; and Microbiology in ...

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