title: Proteomic analysis of differential protein expression in human atherosclerotic plaque progression.
abstract: In this study, differential protein expression was assessed during human atherosclerotic plaque progression. A multifaceted approach was used in which differential protein expression was studied by two-dimensional (2D) gel electrophoresis and validated in individual patients using western blotting and immunohistochemistry. 2D profiles of whole-mount advanced stable lesions were compared to those of plaques containing a thrombus. Mass spectrometry analysis identified vinexin-beta and alpha1-antitrypsin (AAT) in the same spot that was differentially expressed in plaques with a thrombus. Immunohistochemistry and western blotting showed limited expression of both vinexin-beta and AAT in early lesions, whereas high expression of both proteins was found in advanced lesions. Differential expression of vinexin-beta in lesions with a thrombus compared to stable plaques could not be confirmed, indicating the importance of validation of proteomic analysis. For AAT, western blotting of 2D gels revealed expression of six isoforms in advanced plaques, one of which was confirmed to be solely expressed in thrombus-containing plaques. In conclusion, vinexin-beta is expressed in advanced human atherosclerotic plaques, but differential expression of this protein in lesions with a thrombus versus stable plaques could not be confirmed. However, this analysis revealed expression of six isoforms of AAT in advanced plaques, one of which was uniquely expressed in thrombus-containing plaques.
authors.affiliation: Department of Pathology, Cardiovascular Research Institute Maastricht, University of Maastricht, The Netherlands.
authors.forename: Marjo M P C
authors.initials: MM
authors.lastname: Donners
authors.forename: Monique J
authors.initials: MJ
authors.lastname: Verluyten
authors.forename: Freek G
authors.initials: FG
authors.lastname: Bouwman
authors.forename: Edwin C M
authors.initials: EC
authors.lastname: Mariman
authors.forename: Bart
authors.initials: B
authors.lastname: Devreese
authors.forename: Frank
authors.initials: F
authors.lastname: Vanrobaeys
authors.forename: Jozef
authors.initials: J
authors.lastname: van Beeumen
authors.forename: Luc H J M
authors.initials: LH
authors.lastname: van den Akker
authors.forename: Mat J A P
authors.initials: MJ
authors.lastname: Daemen
authors.forename: Sylvia
authors.initials: S
authors.lastname: Heeneman
mesh_terms: D048868:Adaptor Proteins, Signal Transducing / Q000235:genetics* / Q000378:metabolism; D000368:Aged; D001161:Arteriosclerosis / Q000276:immunology / Q000378:metabolism*; D018450:Disease Progression; D015180:Electrophoresis, Gel, Two-Dimensional; D042783:Endothelial Cells / Q000378:metabolism; D015870:Gene Expression; D006801:Humans; D007150:Immunohistochemistry; D008264:Macrophages / Q000378:metabolism; D008297:Male; D013058:Mass Spectrometry; D008875:Middle Aged; D009124:Muscle Proteins / Q000235:genetics* / Q000378:metabolism; D009504:Neutrophils / Q000378:metabolism; D040901:Proteomics; D013927:Thrombosis / Q000276:immunology / Q000378:metabolism; D000515:alpha 1-Antitrypsin / Q000235:genetics* / Q000378:metabolism
chemical_list: D048868:Adaptor Proteins, Signal Transducing; D009124:Muscle Proteins; C486523:SORBS3 protein, human; D000515:alpha 1-Antitrypsin