CYBA C242T polymorphism is associated with obesity and diabetes mellitus in Brazilian hypertensive patients
Article first published online: 19 JUN 2012
© 2012 The Authors. Diabetic Medicine © 2012 Diabetes UK
Volume 29, Issue 7, pages e55–e61, July 2012
How to Cite
Schreiber, R., Ferreira-Sae, M. C., Tucunduva, A. C., Mill, J. G., Costa, F. O., Krieger, J. E., Franchini, K. G., Pereira, A. C. and Nadruz, W. (2012), CYBA C242T polymorphism is associated with obesity and diabetes mellitus in Brazilian hypertensive patients. Diabetic Medicine, 29: e55–e61. doi: 10.1111/j.1464-5491.2012.03594.x
- Issue published online: 19 JUN 2012
- Article first published online: 19 JUN 2012
- Accepted manuscript online: 24 JAN 2012 07:03AM EST
- Accepted 18 January 2012
- diabetes mellitus;
- metabolic profile;
- NADPH oxidase;
- single nucleotide polymorphism
Diabet. Med. 29, e55–e61 (2012)
Aims The CYBA C242T polymorphism has been associated with cardiovascular phenotypes such as hypertension and atherosclerosis, but available data are conflicting. This report investigated the impact of this variant on hypertension and metabolic determinants of cardiovascular risk in a large Brazilian sample.
Methods We cross-sectionally evaluated 1856 subjects (826 normotensive subjects and 1030 hypertensive patients) by clinical history, anthropometry, laboratory analysis and genotyping of the CYBA C242T polymorphism.
Results Genotype frequencies in the whole population were consistent with the Hardy–Weinberg equilibrium and genotype distributions were not different between hypertensive and normotensive subjects. Hypertensive patients with the CC genotype presented lower fasting plasma glucose levels (5.9 ± 0.1 vs. 6.2 ± 0.1 mmol/l, P = 0.020) and waist circumference (94.5 ± 0.6 vs. 96.3 ± 0.6 cm, P = 0.028) than CT + TT ones. Similarly, the prevalence of diabetes mellitus and obesity was also lower in hypertensive patients carrying the CC genotype (16% vs. 21%, P = 0.041; 36% vs. 43%, P = 0.029, respectively). In addition, multiple and logistic regression analysis demonstrated that the CYBA C242T polymorphism was associated with glucose levels, waist circumference, obesity and diabetes mellitus in hypertensive patients independently of potential confounders. Conversely, in normotensive subjects, no significant difference in studied variables was detected between the genotype groups.
Conclusions These data suggest that the T allele of the CYBA C242T polymorphism may be used as a marker for adverse metabolic features in Brazilian subjects with systemic hypertension.