Dietary Protein and Fat Intake Affects Diabetes Risk with CDKAL1 Genetic Variants in Korean Adults

Cyclin-dependent kinase 5 regulatory subunit-associated protein 1-like 1 ( ) is one of the strongest diabetes loci identified to date; evidence suggests that it plays an important role in insulin secretion. Dietary factors that affect insulin demand might enhance the risk of diabetes associated with variants. Our aim was to examine the interactions between dietary protein and fat intake and genetic variants in relation to the risk of diabetes in Korean adults. Single nucleotide polymorphisms (SNPs) were selected with a genome-wide association study (GWAS) for diabetes after adjustment for age, gender, and examination site. Using data from the Health Examinees (HEXA) Study of the Korean Genome and Epidemiology Study (KoGES), 3988 middle-aged Korean adults between 40-76 years of age (2034 men and 1954 women) were included in the study. Finally, rs7756992 located within the gene region was selected from GWAS ( -value < 5 × 10 ). Multivariable logistic regression models were used to evaluate the interactions between genotypes and dietary protein and fat intake in relation to diabetes risk after adjustment for age, gender, BMI, waist circumference, physical activity, smoking status, drinking habits, and examination site. Significant interactions between rs7756992 and dietary protein and fat intake for the risk of diabetes were observed in men ( -value < 0.05). In women, significant interactions between dietary protein and fat intake and variants (rs7756992) were associated with increased risk of diabetes ( -value < 0.05). Dietary protein and fat intake interacted differently with variants in relation to the risk of diabetes in Korean adults of both genders. These findings indicate that variants play a significant role in diabetes and that dietary protein and fat intake could affect these associations.