Deep Proteome Profiling of Circulating Granulocytes Reveals Bactericidal/Permeability-Increasing Protein as a Biomarker for Severe Atherosclerotic Coronary Stenosis
详细信息 查看全文
- 作者：Onno B. Bleijerveld ; Patrick Wijten ; Salvatore Cappadona ; Elizabeth A. McClellan ; Ayse N. Polat ; Reinout Raijmakers ; Jan-Willem Sels ; Loes Colle ; Simona Grasso ; Henk W. van den Toorn ; Bas van Breukelen ; Andrew Stubbs ; Gerard Pasterkamp ; Albert J.R. Heck ; Imo E. Hoefer ; Arjen Scholten
- 刊名：Journal of Proteome Research
- 出版年：2012
- 出版时间：November 2, 2012
- 年：2012
- 卷：11
- 期：11
- 页码：5235-5244
- 全文大小：492K
- 年卷期：v.11,no.11(November 2, 2012)
- ISSN：1535-3907
文摘
Coronary atherosclerosis represents the major cause of death in Western societies. As atherosclerosis typically progresses over years without giving rise to clinical symptoms, biomarkers are urgently needed to identify patients at risk. Over the past decade, evidence has accumulated suggesting cross-talk between the diseased vasculature and cells of the innate immune system. We therefore employed proteomics to search for biomarkers associated with severe atherosclerotic coronary lumen stenosis in circulating leukocytes. In a two-phase approach, we first performed in-depth quantitative profiling of the granulocyte proteome on a small pooled cohort of patients suffering from chronic (sub)total coronary occlusion and matched control patients using stable isotope peptide labeling, two-dimensional LC鈥揗S/MS and data-dependent decision tree fragmentation. Over 3000 proteins were quantified, among which 57 candidate biomarker proteins remained after stringent filtering. The most promising biomarker candidates were subsequently verified in the individual samples of the discovery cohort using label-free, single-run LC鈥揗S/MS analysis, as well as in an independent verification cohort of 25 patients with total coronary occlusion (CTO) and 19 matched controls. Our data reveal bactericidal/permeability-increasing protein (BPI) as a promising biomarker for severe atherosclerotic coronary stenosis, being down-regulated in circulating granulocytes of CTO patients.