Correlations of Estimated Serum Small Dense Low-Density Lipoprotein and Isoprostane with Metabolic Syndrome Criteria between Metabolic Syndrome and Non-Metabolic Syndrome Subjects in Selangor

Abstract

Introduction: Metabolic syndrome (MetS) is a global healthcare burden associated with increased risk of atherosclerosis (ATH). The relationship between atherogenic lipoprotein and oxidative stress biomarkers with clinical risk factors of MetS have not been fully explored.  Therefore, the objective of this study is to determine the correlation between small dense low-density lipoprotein (sdLDL-c) and isoprostane (ISP) with MetS criteria and comparing these biomarkers between MetS and non-MetS. Materials and Methods: This was a cross sectional study involving 67 MetS and 43 non-MetS diagnosed by JIS criteria 2009. Demographic details and anthropometric measurements were recorded. Blood samples were collected to analyse serum plasma glucose, direct LDL, calculated sdLDL-c and ISP. Results: Mean serum sdLDL-c and ISP levels were significantly higher among those with MetS compared to non-MetS (1.14+0.44 mmol/L vs 0.87±0.38 mmol/L respectively, p=0.005).  Similarly, mean serum ISP concentration was higher among MetS compared to non-MetS (884.40+602.69 ng/L vs 657.89±616.42 ng/L respectively, p= 0.054). sdLDL-c was positively correlated with TG in the MetS (Pearson correlation 0.501, p<.001) whilst HDL-c was positively correlated with sdLDL-c among the non-MetS (Pearson Correlation 0.422, p<.005). Conclusion: This study highlights the correlation between sdLDL-c and TG in among MetS, emphasizing the need to closely monitor and manage TG among this cohort to reduce the risk of ATH. It was also noted that HDL-c showed positive correlation with sdLDL-c among non-MetS. This discordant finding suggests that HDL-c itself may not be causally associated with cardiovascular benefits and that perhaps HDL-c subfractions may be a better approach to determine cardioprotective effects of HDL-c.