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A Lectin Immunosensor Technique for Determination of α1-Acid Glycoprotein Fucosylation

Liljeblad, Mathias (author)
Linköpings universitet,Klinisk kemi,Hälsouniversitetet
Rydén, Ingvar (author)
Department of Clinical Chemistry, Kalmar County Hospital, Kalmar, Sweden
Ohlson, Sten (author)
Division of Biochemistry/Biotechnology, Department of Chemistry and Biomedical Sciences, University of Kalmar, Kalmar, Sweden
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Lundblad, Arne, 1937- (author)
Linköpings universitet,Klinisk kemi,Hälsouniversitetet
Påhlsson, Peter, 1962- (author)
Linköpings universitet,Klinisk kemi,Hälsouniversitetet
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 (creator_code:org_t)
Elsevier BV, 2001
2001
English.
In: Analytical Biochemistry. - : Elsevier BV. - 0003-2697 .- 1096-0309. ; 288:2, s. 216-224
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • The fucosylation of α1-acid glycoprotein (AGP), an acute-phase protein, is known to change in association with inflammatory diseases. Thus, fucosylation of AGP could be a potential diagnostic or prognostic marker. The change in fucosylation has previously been investigated using crossed affinoimmunoelectrophoresis, high-pH anion-exchange chromatography, and lectin ELISA. This study describes a surface plasmon resonance-based affinity biosensor assay for quantification of the fucosylation of AGP. Diluted EDTA plasma or serum was injected directly in a BIACORE 2000 biosensor. AGP was captured on the sensor surface using immobilized antibodies and a fucose-binding lectin from Aleuria aurentia was then used for the detection of fucosylation. The feature of the biosensor makes it possible to determine both the amount of bound AGP and the amount of bound lectin. Using a calibration curve it was possible to obtain a fucosylation ratio that was independent of AGP concentration. The assay was validated against a lectin ELISA and used to follow inflammation in patients with severe burns.

Keyword

a1-acid glycoprotein
Aleuria aurentia lectin
Fucose
Glycosylation
Surface plasmon resonance
MEDICINE
MEDICIN

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ref (subject category)
art (subject category)

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