The polymorphisms rs3758391 and rs1800470 located in SIRT1 and TGF-β1 have been associated with type 2 diabetes in different populations but its functional effect is not clear.
Multivariate model analysis, including T2D status, age, and body mass index (BMI), displayed significant covariance in PPARGC-1α rs8192678; SIRT1 rs7896005; TCF7L2 rs7903146 and rs122243326; UCP3 rs3781907; and HHEX rs1111875 with a P < 0.05.
All polymorphisms were in Hardy-Weinberg equilibrium, and the association by genotype with T2D-related traits displayed nominal significance for rs8192678 with glucose (<i>p</i> = 0.023) and triglycerides (<i>p</i> = 0.013); rs2010963 with diastolic blood pressure (DBP) (<i>p</i> = 0.012) and cholesterol (<i>p</i> = 0.013); rs7896005 with DBP (<i>p</i> = 0.012) and insulin (<i>p</i> = 0.011); and rs659366 with cholesterol (<i>p</i> = 0.034), glucose (<i>p</i> = 0.031) and triglycerides (<i>p</i> = 0.028); and the association of rs2010963 with HDL-C (<i>p</i> = 0.0007) was significant.
Two tag SNPs, rs10509291 and rs7896005, were nominally associated with type 2 diabetes (P=0.01, OR=1.25 95%CI 1.05-1.48, and P=0.02, OR=1.17 95%CI 1.02-1.34, respectively; additive P values adjusted for age, sex, birth year, and family membership), but not BMI (adjusted P values 0.52 and 0.45, respectively).
The results were adjusted using logistic regression analysis.C allele of rs12778366 polymorphism was significantly correlated with reduced DF susceptibility which deriving from healthy controls (adjusted OR = 0.364, 95% CI = 0.158-0.835) so was patients with T2DM (P = .047, OR = 0.591, 95%CI = 0.349-0.998), but the results became nonsignificant adjusted by clinical features (adjusted OR = 0.654, 95% CI = 0.391-1.094).
Minor alleles of these SNPs were associated with a lower prevalence of type 2 diabetes only in individuals who had been exposed to famine prenatally (odds ratio for rs7895833 0.50 [95% CI 0.24-1.03], P = 0.06; for rs1467568 0.48 [0.25-0.91], P = 0.02).