Association of small dense lowdensity lipoprotein cholesterol in type 2 diabetics with coronary artery disease

Biomed J. Nov-Dec 2014;37(6):375-9. doi: 10.4103/2319-4170.132883.

Abstract

Background: The risk of coronary artery disease (CAD) increases two- to fourfold in diabetes. Small dense low-density lipoprotein (sdLDL) particles have been linked to an increased risk for CAD. In this study, we sought to compare the sdLDL cholesterol (sdLDL-C) level between the healthy control group and diabetics with CAD in the Taiwanese population.

Methods: Serum specimens were collected from healthy females and males of various age groups (n = 294), type 2 diabetics (DM) without complications (n = 113), and patients having DM with CAD (DM-CAD) (n = 46). The commercial kit was used for the measurement of sdLDL-C level, which employs a simpler method. After heparin-magnesium precipitation of lipoproteins with density <1.044 g/ml, sdLDL (density = 1.044-1.063 g/ml) remained in the supernatant and this sdLDL-C was measured using an automated chemistry analyzer.

Results: The sdLDL-C level was significantly higher in males than in females (p < 0.001) and there was an age effect on sdLDL-C (p < 0.001). The DM-CAD group had significantly higher sdLDL-C levels than the healthy control group (p < 0.001), but there was no statistical difference in the LDL-C level between DM-CAD group and the healthy control group. In addition, only individuals having both high LDL-C and sdLDL-C levels had a higher risk for DM-CAD, compared to those with low LDL-C levels and low sdLDL-C levels [Odds Ratio (OR) 4.97; 95% Confidence Interval (CI) 1.96-12.57; p = 0.001].

Conclusions: Our data suggest that the sdLDL-C level together with the LDL-C level are better risk assessment markers for type 2 diabetics with CAD than the LDL-C level alone.

MeSH terms

  • Adult
  • Aged
  • Aged, 80 and over
  • Cholesterol / metabolism*
  • Cholesterol, HDL / metabolism
  • Cholesterol, LDL / metabolism*
  • Coronary Artery Disease / blood*
  • Coronary Artery Disease / complications
  • Coronary Artery Disease / diagnosis
  • Diabetes Mellitus, Type 2 / blood*
  • Diabetes Mellitus, Type 2 / complications
  • Diabetes Mellitus, Type 2 / diagnosis
  • Female
  • Humans
  • Lipoproteins / metabolism*
  • Male
  • Middle Aged
  • Risk Assessment
  • Risk Factors
  • Young Adult

Substances

  • Cholesterol, HDL
  • Cholesterol, LDL
  • Lipoproteins
  • lipoprotein cholesterol
  • Cholesterol