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Studies of the release and turnover of a human neutrophil lipocalin
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- Axelsson, L. (author)
- Lund University,Lunds universitet,Experimentell patologi, Malmö,Forskargrupper vid Lunds universitet,Experimental Pathology, Malmö,Lund University Research Groups,Skåne University Hospital
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- Bergenfeldt, M. (author)
- Lund University,Lunds universitet,Kirurgi, Lund,Sektion V,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Surgery (Lund),Section V,Department of Clinical Sciences, Lund,Faculty of Medicine,Skåne University Hospital
- Ohlsson, K. (author)
- (creator_code:org_t)
- 2009-07-08
- 1995
- English 12 s.
- In: Scandinavian Journal of Clinical and Laboratory Investigation. - : Informa UK Limited. - 0036-5513 .- 1502-7686. ; 55:7, s. 577-588
- Journal article (peer-reviewed)
Abstract
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- A 24-kDa protein was purified from human neutrophil extracts and shown to be the newly discovered neutrophil gelatinase-associated lipocalin (NGAL), based on structural and immunochemical data. A specific enzyme-linked immunosorbent assay (ELISA) was developed for the determination of NGAL in human plasma and tissue fluids. Normal human plasma contains 72 μg 1-1 of NGAL (range 40-109 μg 1-1) in two main forms, monomer and dimer. 35S-methionine metabolic studies of human neutrophils showed that granulocyte macrophagecolony-stimulating factor (GMCSF) stimulated significant synthesis and secretion of NGAL in a dose- and time-dependent fashion. NGAL was rapidly released as monomer and dimer on incubation of heparinized whole blood with opsonized yeast, reaching a plateau corresponding to about 35% of total cell content after 30 min. Following intravenous injection of 125-iodine labelled NGAL there was a more rapid initial clearance of the monomeric than of the dimeric form; t1/2 10 min vs. 20 min. During the second phase the two forms cleared at similar rates. Severe acute peritonitis was accompanied by a 10-fold increase in NGAL plasma levels and the NGAL level in peritoneal exudates, which reached about 40 mg 1-1. There was a good linear correlation between the concentrations of NGAL, leucocyte elastase and NP4 (neutrophil proteinase 4 = P3).
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Medicinska och farmaceutiska grundvetenskaper -- Läkemedelskemi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Basic Medicine -- Medicinal Chemistry (hsv//eng)
Keyword
- Cytokines
- ELISA
- Leucocyte proteinases
- Lipocalin
- Neutrophil
- Peritonitis
- Phagocytosis
Publication and Content Type
- art (subject category)
- ref (subject category)
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