28 April 2014 : Original article
Med Sci Monit 2014; 20:698-705
BACKGROUND: Chemerin is a novel adipokine that plays a role in inflammation and atherosclerosis. Although there are several correlations between hypertension and the inflammatory system, there is still insufficient information about the relationship between blood pressure variability and inflammatory markers. In this study, we aimed to determine whether chemerin levels are elevated in non-dipper patients compared with dippers and healthy controls.
MATERIAL AND METHODS: This study was composed of a group of 90 patients: 60 hypertensive patients and 30 healthy control subjects (12 males, mean age 53.2±15.4 years). Ambulatory blood pressure monitoring devices (ABPM) were connected to all patients. Using data from the ABPM, hypertensive patients were divided into 2 groups: 30 dipper patients (12 males, mean age 52.5±15.1 years) and 30 non-dipper patients (11 males, mean age 54.6±13.0 years). Complete blood count and biochemistry were measured by standard methods and plasma chemerin concentrations were quantified by ELISA.
RESULTS: Non-dipper patients demonstrated higher chemerin levels compared to dippers and normotensives (219.7±16.3 vs. 182.4±21.4 ng/ml; 219.7±16.3 vs. 85.4±38.1 ng/ml, respectively, p<0.001 for both comparisons). A receiver operating characteristic curve analysis revealed that the optimal cut-off value for chemerin to predict a non-dipping pattern was 201.4, with 90% sensitivity and 90% specificity. There was a positive correlation between chemerin levels and all ambulatory blood pressure values in all hypertensive patients.
CONCLUSIONS: Chemerin, which plays a role in inflammation and atherosclerosis, was higher in non-dippers compared to dippers and normotensives. Additionally, chemerin shows positive correlations with blood pressure.
Keywords: Blood Pressure Monitoring, Ambulatory, Blood Pressure, Case-Control Studies, Chemokines - blood, Circadian Rhythm, Hypertension - physiopathology, ROC Curve
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