Relationship between a concentration of lipoprotein-associated secretory phospholipase A2 and markers of subclinical atherosclerotic lesion of arterial wall in patients with low and moderate risk by SCORE scale

Abstract

Aim. To show relations between a concentration of lipoprotein-associated secretory phospholipase A2 (LPPLa2) and markers of subclinical atherosclerotic lesion of the arterial wall in patients with low and moderate risk by the SCORE scale. Material and methods. A total of 378 individuals with low and moderate risk of atherosclerotic lesion of the arterial wall (285 females, 93 males) were divided into groups by 1) age and sex, 2) number of atherosclerotic plaques (ASP) in the carotid arteries: 0ASP (n = 158), ASP (n = 61), more than one ASP (n = 159); 3) plaque characteristics: homogeneous (n = 31), heterogenous (n = 189), 4) the presence of ASP in CA and level of LPPLa2 in the blood (with high content - n = 137, with normal content - n = 83). Duplex CA scanning was made to estimate intima-media thickness (IMT), to detect AP in the CA. Computer sphygmography estimated velocity of the pulse wave (PWV) from the carotid to femoral artery. Normal values of IMT and PWV were estimated individually with reference to gender and age. LPPLa2 was measured immunoturbodimetrically using diagnostic kits (PLAC Test Elisa Kit, diaDexus, USA), shreshold value 0.05). In the groups with homogeneous and heterogenous ASP significant differencies were neither between the medians nor between frequency of deviation from normal (p = 0.28). 25.5% patients from the group with an elevated level of LPPLa2 had ASP with a hypoechogenic component. Conclusion. No significant correlation was revealed between concentration of LPPLa2, IMT PWV, number of ASP and carotid stenosis.

Keywords

• lipoprotein-associated secretory phospholipase a2
• unstable atherosclerotic plaques
• inflammation factors
• subclinical atherosclerosis