Abstract
We enrolled 132 outpatients with cardiovascular risk factors to evaluate the serotonin levels in platelet-poor plasma (PPP) and whole blood (WB). PPP serotonin levels and PPP/WB serotonin ratio were significantly correlated with levels of oxidative stress measured by derivative reactive oxygen metabolites (d-ROM). Twenty-five subjects were revealed to have stable coronary artery disease (CAD), and the levels CRP, d-ROM, and PPP/WB serotonin ratio were significantly higher in subjects with CAD than in those without CAD. Logistic regression analysis performed with the endpoint of having CAD revealed that the PPP/WB serotonin ratio was independently associated with CAD (odds ratio 3.37, 95% confidence interval 1.04–10.9, P = 0.04). Receiver operating characteristic (ROC) curve analyses to discriminate subjects with CAD from those without CAD indicated that combining PPP/WB serotonin ratio and d-ROM improved diagnostic utility. Targeting the serotonin–oxidative stress axis as part of a holistic anti-atherothrombotic strategy could be beneficial for patients with atherosclerosis.
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