Adiponectin Genetic Variability, Plasma Adiponectin, and Cardiovascular Risk in Patients With Type 2 Diabetes

Abstract

Adiponectin is an adipocyte-derived hormone that has shown anti-inflammatory and antiatherogenic effects. We assessed the associations of variants in the adiponectin gene (ADIPOQ) with circulating adiponectin levels and cardiovascular risk among women with type 2 diabetes. Of 989 diabetic women from the Nurses’ Health Study, 285 developed cardiovascular disease (CVD) during follow-up through 2000. We genotyped five ADIPOQ polymorphisms in the CVD case and control subjects. A promoter polymorphism −11365C→G was significantly associated with lower plasma adiponectin levels (P = 0.004). The homozygotes of allele −4034C were significantly associated with ∼60% increased cardiovascular risk (odds ratio 1.62 [95% CI 1.07–2.45]). Adjustment for age, BMI, and other covariates did not appreciably change the associations. In addition, a common haplotype possessing allele +276T (CAATT) was associated with a significantly lower CVD risk than the most common haplotype (CAATG) (0.70 [0.50–0.98]). In our meta-analysis of 827 CVD case and 1,887 CVD-free control subjects, polymorphism +276G→T was significantly associated with ∼45% (20–62%) decreased CVD risk under a recessive inheritance mode in diabetic patients. In conclusion, ADIPOQ promoter polymorphism −11365C→G was associated with plasma adiponectin levels, whereas polymorphisms −4034A→C and +276G→T were associated with CVD risk in diabetic patients.