LDL aggregation susceptibility is higher in healthy South Asian compared with white Caucasian men

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Ruuth , M , Janssen , L G M , Aikas , L , Tigistu-Sahle , F , Nahon , K J , Ritvos , O , Ruhanen , H , Käkelä , R , Boon , M R , Öörni , K & Rensen , P C N 2019 , ' LDL aggregation susceptibility is higher in healthy South Asian compared with white Caucasian men ' , Journal of Clinical Lipidology , vol. 13 , no. 6 , pp. 910-919 . https://doi.org/10.1016/j.jacl.2019.09.011

Title: LDL aggregation susceptibility is higher in healthy South Asian compared with white Caucasian men
Author: Ruuth, Maija; Janssen, Laura G. M.; Aikas, Lauri; Tigistu-Sahle, Feven; Nahon, Kimberly J.; Ritvos, Olli; Ruhanen, Hanna; Käkelä, Reijo; Boon, Marlette R.; Öörni, Katariina; Rensen, Patrick C. N.
Contributor: University of Helsinki, Medicum
University of Helsinki, Faculty of Biological and Environmental Sciences
University of Helsinki, Wihuri Research Institute
University of Helsinki, Department of Physiology
University of Helsinki, Molecular and Integrative Biosciences Research Programme
University of Helsinki, Molecular and Integrative Biosciences Research Programme
University of Helsinki, Biosciences
Date: 2019-12
Language: eng
Number of pages: 10
Belongs to series: Journal of Clinical Lipidology
ISSN: 1933-2874
URI: http://hdl.handle.net/10138/309494
Abstract: BACKGROUND: South Asians are more prone to develop atherosclerotic cardiovascular disease (ASCVD) compared with white Caucasians, which is not fully explained by classical risk factors. We recently reported that the presence of aggregation-prone low-density lipoprotein (LDL) in the circulation is associated with increased ASCVD mortality. OBJECTIVE: We hypothesized that LDL of South Asians is more prone to aggregate, which may be explained by differences in their LDL lipid composition. METHODS: In this cross-sectional hypothesis-generating study, LDL was isolated from plasma of healthy South Asians (n = 12) and age- and BMI-matched white Caucasians (n = 12), and its aggregation susceptibility and lipid composition were analyzed. RESULTS: LDL from South Asians was markedly more prone to aggregate compared with white Caucasians. Among all measured lipids, sphingomyelin 24:0 and triacylglycerol 56:8 showed the highest positive correlation with LDL aggregation. In addition, LDL from South Asians was enriched in arachidonic acid containing phosphatidylcholine 38:4 and had less phosphatidylcholines and cholesteryl esters containing monounsaturated fatty acids. Interestingly, body fat percentage, which was higher in South Asians (+26%), positively correlated with LDL aggregation and highly positively correlated with triacylglycerol 56:8, sphingomyelin 24:0, and total sphingomyelin. CONCLUSIONS: LDL aggregation susceptibility is higher in healthy young South Asians compared with white Caucasians. This may be partly explained by the higher body fat percentage of South Asians, leading to sphingomyelin enrichment of LDL. We anticipate that the presence of sphingomyelin-rich, aggregation -prone LDL particles in young South Asians may increase LDL accumulation in the arterial wall and thereby contribute to their increased risk of developing ASCVD later in life. (C) 2019 National Lipid Association. Published by Elsevier Inc.
Subject: LDL
Atherosclerosis
South Asians
Lipidomics
Sphingomyelin
LDL aggregation
Ethnicity
LOW-DENSITY-LIPOPROTEIN
CORONARY-HEART-DISEASE
BODY-MASS INDEX
ATHEROGENIC LIPOPROTEINS
RISK-FACTORS
SUBENDOTHELIAL RETENTION
SPHINGOMYELINASE
ATHEROSCLEROSIS
PLASMA
APOLIPOPROTEIN-B-100
317 Pharmacy
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