Relationship between renal function and circulating microparticles, soluble P-selectin and E-selectin levels in atrial fibrillation

AbstractAtrial fibrillation (AF) and chronic kidney disease are closely related, and any associated risk of stroke and thromboembolism due to AF is increased by concurrent renal dysfunction. The mechanism(s) for this include abnormalities in platelets and endothelial cells. We hypothesized relationships between levels of circulating platelet microparticles (PMPs, defined by CD42b), soluble P selectin (both reflecting platelet activation), soluble E-selectin (reflecting endothelial activation) and endothelial/platelet microparticles (EPMPs, defined by CD31) with progressive renal dysfunction. Blood samples were obtained from 160 anticoagulated AF patients. Microparticles were measured by flow cytometry, soluble E and P selectin levels by ELISA. Renal function was determined by estimated glomerular filtration rate (eGFR). EPMP levels demonstrated a linear increased trend across quartiles of eGFR (p  = 0.034) and CKD stage (p <  0.001), and correlated with eGFR and serum creatinine (p <  0.01). PMPs, P-selectin and E-selectin levels were not significantly different across groupings of renal dysfunction, and no significant correlations with eGFR were evident (p = 0.186, p = 0.561, p = 0.746 respectively). Stepwise multivariable regression analysis demonstrated that wor sening renal function was an independent predictor of EPMP levels (p <  0.001). In well-anticoagulated AF patients, there is potential relationship between endothelial function ...
Source: Journal of Thrombosis and Thrombolysis - Category: Hematology Source Type: research