In this study, a magnetic bead-based platform amenable to high-throughput protein carbonic anhydrase II (CA II) capture is presented. The key steps in this approach involved immunoaffinity purification of the target protein from serum followed by on-bead digestion with trypsin to release a surrogate peptide. This tryptic peptide was quantified by liquid chromatography-electrospray ionization-tandem mass spectrometry (LC-ESI-MS/MS) operating in multiple reaction monitoring acquisition mode. Using a synthetic peptide standard and a structural analogue free-labeled internal standard, the resulting concentration was stoichiometrically converted to CA II serum concentration. The analytical steps, such as preparation of immunobeads, protein capture, proteolysis, and calibration, were optimized. The method was validated in terms of recovery (77%), reproducibility (relative standard deviation [RSD]<12%), and method detection limit (0.5pmolml-1). The developed method was applied to determining the CA II in eight healthy subjects, and the concentration measured was 27.3pmolml-1 (RSD=65%).

Immunoprecipitation on magnetic beads and LC/MS/MS for carbonic anhydrase II quantification in human serum / Callipo, Luciano; Caruso, Giuseppe; Foglia, Patrizia; Gubbiotti, Riccardo; Samperi, Roberto; Lagana', Aldo. - In: ANALYTICAL BIOCHEMISTRY. - ISSN 0003-2697. - STAMPA. - 400:2(2010), pp. 195-202. [10.1016/j.ab.2010.01.039]

Immunoprecipitation on magnetic beads and LC/MS/MS for carbonic anhydrase II quantification in human serum.

CALLIPO, LUCIANO;CARUSO, Giuseppe;FOGLIA, Patrizia;GUBBIOTTI, RICCARDO;SAMPERI, Roberto;LAGANA', Aldo
2010

Abstract

In this study, a magnetic bead-based platform amenable to high-throughput protein carbonic anhydrase II (CA II) capture is presented. The key steps in this approach involved immunoaffinity purification of the target protein from serum followed by on-bead digestion with trypsin to release a surrogate peptide. This tryptic peptide was quantified by liquid chromatography-electrospray ionization-tandem mass spectrometry (LC-ESI-MS/MS) operating in multiple reaction monitoring acquisition mode. Using a synthetic peptide standard and a structural analogue free-labeled internal standard, the resulting concentration was stoichiometrically converted to CA II serum concentration. The analytical steps, such as preparation of immunobeads, protein capture, proteolysis, and calibration, were optimized. The method was validated in terms of recovery (77%), reproducibility (relative standard deviation [RSD]<12%), and method detection limit (0.5pmolml-1). The developed method was applied to determining the CA II in eight healthy subjects, and the concentration measured was 27.3pmolml-1 (RSD=65%).
2010
Biomarkers; Carbonic anhydrase; Immunobeads; Serum proteins; Tandem mass spectrometry
01 Pubblicazione su rivista::01a Articolo in rivista
Immunoprecipitation on magnetic beads and LC/MS/MS for carbonic anhydrase II quantification in human serum / Callipo, Luciano; Caruso, Giuseppe; Foglia, Patrizia; Gubbiotti, Riccardo; Samperi, Roberto; Lagana', Aldo. - In: ANALYTICAL BIOCHEMISTRY. - ISSN 0003-2697. - STAMPA. - 400:2(2010), pp. 195-202. [10.1016/j.ab.2010.01.039]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/92458
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