Diagnostic and Prognostic Value of Low Density Lipoprotein-Containing Circulating Immune Complexes in Atherosclerosis
- 181 Downloads
Recently, it has been shown that increased level of LDL-containing circulating immune complexes (LDL-CIC) possess high diagnostic significance in clinically manifested atherosclerosis, but little is known about its diagnostic and prognostic significance in early atherosclerosis. Two-years prospective study was performed in 98 asymptomatic men aged 40–74. The rate of atherosclerosis progression was estimated by high-resolution B-mode ultrasonography as the increase in intima-media thickness (IMT) of common carotid arteries. The patients with elevated baseline levels of LDL-CIC were characterized by significantly higher levels of total and LDL cholesterol as well as significantly increased mean IMT of common carotid arteries. Among all baseline lipid parameters, only LDL-CIC and LDL cholesterol were contingent with the extent of early carotid atherosclerosis (p = 0.042 and p = 0.049, respectively) and had the highest levels of relative risk and odds ratio. During the follow up, significant IMT increase was registered in 53.1 % (n = 52) patients, IMT significant reduction was observed in 21.4 % (n = 21) patients. The increased levels of LDL-CIC, total serum cholesterol and LDL cholesterol had similar prognostic significance with the respect of atherosclerosis progression. The normal level of LDL-CIC (below than 16.0 μg/ml) was the only lipid parameter that predicted the absence of carotid atherosclerosis progression for two following years at prognostic value of 78.3 %. The results of the study allow assuming that LDL-CIC level may be employed not only as a marker of early atherosclerosis, but also has a sufficient prognostic value for clinical implications.
KeywordsAtherosclerosis carotid arteries imaging immunology lipoproteins
We thank Maria V. Razumkina for assistance with statistical analysis.
The study was supported by the Russian Ministry of Education and Science.
Conflict of Interest
There are no conflicts of interest related to the manuscript.
All authors have contributed in a substantive and intellectual manner to the work described.
- 14.Salonen R, Nyyssönen K, Porkkala E, Rummukainen J, Belder R, Park JS, Salonen JT. Kuopio Atherosclerosis Prevention Study (KAPS). A population-based primary preventive trial of the effect of LDL lowering on atherosclerotic progression in carotid and femoral arteries. Circulation. 1995;92:1758–64.PubMedCrossRefGoogle Scholar
- 32.Lopes-Virella MF, McHenry MB, Lipsitz S, Yim E, Wilson PF, Lackland DT, Lyons T, Jenkins AJ, Virella G. DCCT/EDIC Research Group. Immune complexes containing modified lipoproteins are related to the progression of internal carotid intima-media thickness in patients with type 1 diabetes. Atherosclerosis. 2007;190:359–69.PubMedCrossRefGoogle Scholar
- 33.Lopes-Virella MF, Hunt KJ, Baker NL, Lachin J, Nathan DM, Virella G. Levels of oxidized LDL and advanced glycation end products-modified LDL in circulating immune complexes are strongly associated with increased levels of carotid intima-media thickness and its progression in type 1 diabetes. Diabetes Control and Complications Trial/Epidemiology of Diabetes Interventions and Complications Research Group. Diabetes. 2011;60:582–9.PubMedCrossRefGoogle Scholar