proteomic analysis of plasma-purified vldl, ldl, and hdl fractions from atherosclerotic patients undergoing carotid endarterectomy: identification of serum amyloid a as a potential marker

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ID: 209922
2013
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Abstract
Apolipoproteins are very heterogeneous protein family, implicated in plasma lipoprotein structural stabilization, lipid metabolism, inflammation, or immunity. Obtaining detailed information on apolipoprotein composition and structure may contribute to elucidating lipoprotein roles in atherogenesis and to developing new therapeutic strategies for the treatment of lipoprotein-associated disorders. This study aimed at developing a comprehensive method for characterizing the apolipoprotein component of plasma VLDL, LDL, and HDL fractions from patients undergoing carotid endarterectomy, by means of two-dimensional electrophoresis (2-DE) coupled with Mass Spectrometry analysis, useful for identifying potential markers of plaque presence and vulnerability. The adopted method allowed obtaining reproducible 2-DE maps of exchangeable apolipoproteins from VLDL, LDL, and HDL. Twenty-three protein isoforms were identified by peptide mass fingerprinting analysis. Differential proteomic analysis allowed for identifying increased levels of acute-phase serum amyloid A protein (AP SAA) in all lipoprotein fractions, especially in LDL from atherosclerotic patients. Results have been confirmed by western blotting analysis on each lipoprotein fraction using apo AI levels for data normalization. The higher levels of AP SAA found in patients suggest a role of LDL as AP SAA carrier into the subendothelial space of artery wall, where AP SAA accumulates and may exert noxious effects.
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lepedda2013oxidativeproteomic Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Antonio J. Lepedda;Gabriele Nieddu;Elisabetta Zinellu;Pierina De Muro;Franco Piredda;Anna Guarino;Rita Spirito;Franco Carta;Francesco Turrini;Marilena Formato
Journal journal of aoac international
Year 2013
DOI
10.1155/2013/385214
URL
http://dx.doi.org/10.1155/2013/385214
Keywords
cytology

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