Association between LXR-α and ABCA1 Gene Polymorphisms and the Risk of Diabetic Kidney Disease in Patients with Type 2 Diabetes Mellitus in a Chinese Han Population

Abstract

We designed a case-control study and selected LXR-α rs7120118 C>T and ABCA1 rs2230806 A>G polymorphisms to determine the correlation between these polymorphisms and diabetic kidney disease (DKD) susceptibility in a Chinese Han population. Three hundred DKD patients and 346 type 2 diabetes mellitus (DM) patients without kidney disease were recruited. Our results showed that rs7120118 was associated with DKD (genotype, $P=.027$ ; allele, $P<.011$ ). rs7120118 was associated with a higher risk of DKD under a dominant model adjustment by age and sex ( $P=.015$ ) and an additive model ( $P=.040$ ); rs2230806 was associated with a higher risk of DKD under an recessive model ( $P<.03$ ); the combined effect of rs7120118 CC+rs2230806 GG genotype showed an association of DKD adjustment for age and sex ( $P=.009$ ). In subgroup analysis of patients without hypercholesterolemia, the rs2230806 genotype frequencies were different between the two groups ( $P=.042$ ). rs2230806 was associated with increased risk of DKD under a recessive model adjustment for age and sex ( $P=.013$ ) and an additive model ( $P=.031$ ). Our results suggest that LXR-α rs7120118 is significantly associated with a higher risk of DKD, and ABCA1 rs2230806 is significantly associated with a higher risk of DKD without hypercholesterolemia in Chinese Han individuals.