Association between the rs4880 superoxide dismutase 2 (C>T) gene variant and coronary heart disease in diabetes mellitus

Diabetes Res Clin Pract. 2010 Nov;90(2):196-201. doi: 10.1016/j.diabres.2010.07.009. Epub 2010 Aug 21.

Abstract

Mitochondrial superoxide dismutase 2 (SOD2) is an endogenous anti-oxidant enzyme. The rs4880 gene variant results in a C>T substitution, influencing SOD enzymatic activity. This variant has been associated with micro- and macro-vascular complications in diabetes mellitus. Our aim was to examine the association between this variant and coronary heart disease (CHD) risk in a cross-sectional sample of subjects with diabetes. 776 Caucasian subjects with diabetes were genotyped. CHD risk, oxidised-LDL and plasma total anti-oxidant status (TAOS) were analysed in relation to genotype. In females, the TT genotype was associated with CHD (CC/CT/TT: No CHD vs. CHD: 22.4/56.0/21.6% vs. 12.0/50.0/38.0%, p=0.03; for CC/CT vs. TT, p=0.01). The odds ratio for CHD associated with the TT genotype compared to CC/CT was 2.22 [95%CI: 1.17-4.24], p=0.01. The TT genotype was also associated with significantly lower plasma TAOS. In males, no association was observed between genotype and CHD risk, but CHD was significantly associated with age, lower HDL, higher triglycerides, higher BMI and cigarette smoking. The TT genotype of this variant is associated with increased CHD risk and lower plasma anti-oxidant defences in females with diabetes. This modest genotype-effect is not apparent in males where traditional risk factors may play a greater role.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Aged
  • Antioxidants / metabolism
  • Base Sequence
  • Coronary Disease / blood
  • Coronary Disease / epidemiology
  • Coronary Disease / genetics*
  • DNA Primers
  • Diabetic Angiopathies / blood
  • Diabetic Angiopathies / epidemiology
  • Diabetic Angiopathies / genetics*
  • Ethnicity / genetics
  • Female
  • Genetic Variation*
  • Genotype
  • Glycated Hemoglobin / metabolism
  • Humans
  • Lipoproteins, LDL / blood
  • Male
  • Middle Aged
  • Polymorphism, Single Nucleotide*
  • Racial Groups / genetics
  • Risk Assessment
  • Sex Characteristics
  • Superoxide Dismutase / genetics*

Substances

  • Antioxidants
  • DNA Primers
  • Glycated Hemoglobin A
  • Lipoproteins, LDL
  • oxidized low density lipoprotein
  • Superoxide Dismutase
  • superoxide dismutase 2