|Title||Plasma protein biosignatures for detection of cardiac allograft vasculopathy.|
|Publication Type||Journal Article|
|Year of Publication||2013|
|Authors||Lin, D, Freue, GCohen, Hollander, Z, Mancini, GBJohn, Sasaki, M, Mui, A, Wilson-McManus, J, Ignaszewski, A, Imai, C, Meredith, A, Balshaw, R, Ng, RT, Keown, PA, W McMaster, R, Carere, R, Webb, JG, McManus, BM|
|Corporate Authors||Biomarkers in Transplantation Team, Networks of Centres of Excellence, Centres of Excellence for Commercialization and Research-Prevention of Organ Failure Centre of Excellence|
|Journal||J Heart Lung Transplant|
|Date Published||2013 Jul|
|Keywords||Blood Proteins, Female, Heart Transplantation, Humans, Male, Middle Aged, Proteomics, Transplantation, Homologous, Vascular Diseases|
BACKGROUND: Coronary angiography remains the most widely used tool for routine screening and diagnosis of cardiac allograft vasculopathy (CAV), a major pathologic process that develops in 50% of cardiac transplant recipients beyond the first year after transplant. Given the invasiveness, expense, discomfort, and risk of complications associated with angiography, a minimally invasive alternative that is sensitive and specific would be highly desirable for monitoring CAV in patients.
METHODS: Plasma proteomic analysis using isobaric tags for relative and absolute quantitation-matrix-assisted laser desorption ionization double time-of-flight mass spectrometry was carried out on samples from 40 cardiac transplant patients (10 CAV, 9 non-significant CAV, 21 possible CAV). Presence of CAV was defined as left anterior descending artery diameter stenosis ≥ 40% by digital angiography and quantitatively measured by blinded expert appraisal. Moderated t-test robust-linear models for microarray data were used to identify biomarkers that are significantly differentially expressed between patient samples with CAV and with non-significant CAV. A proteomic panel for diagnosis of CAV was generated using the Elastic Net classification method.
RESULTS: We identified an 18-plasma protein biomarker classifier panel that was able to classify and differentiate patients with angiographically significant CAV from those without significant CAV, with an 80% sensitivity and 89% specificity, while providing insight into the possible underlying immune and non-alloimmune contributory mechanisms of CAV.
CONCLUSION: Our results support of the potential utility of proteomic biomarker panels as a minimally invasive means to identify patients with significant, angiographically detectable coronary artery stenosis in the cardiac allograft, in the context of post-cardiac transplantation monitoring and screening for CAV. The potential biologic significance of the biomarkers identified may also help improve our understanding of CAV pathophysiology.
|Alternate Journal||J. Heart Lung Transplant.|
|Grant List||/ / Canadian Institutes of Health Research / Canada|