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Association and interaction analyses of genetic variants in ADIPOQ, ENPP1, GHSR, PPARgamma and TCF7L2 genes for diabetic nephropathy in a Taiwanese population with type 2 diabetes.

Wu, Lawrence Shih-Hsin; Hsieh, Chang-Hsun; Pei, Dee; Hung, Yi-Jen; Kuo, Shi-Wen; Lin, Eugene.
Nephrol Dial Transplant; 24(11): 3360-6, 2009 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-19506043

BACKGROUND:

Diabetic nephropathy (DN) is a common microvascular complication of diabetes. In this study, we aimed to explore both primary effects of single-locus and multilocus interactions to test the hypothesis that the type 2 diabetes (T2D) genes may contribute to the aetiology of DN in T2D independently and/or through complex interactions in a Taiwanese population with T2D.

METHODS:

We genotyped six single nucleotide polymorphisms (SNPs) for five common T2D genes including adiponectin, C1Q and collagen domain containing (ADIPOQ), ectonucleotide pyrophosphatase/ phosphodiesterase 1 (ENPP1), growth hormone secretagogue receptor (GHSR), peroxisome proliferator-activated receptor gamma (PPARgamma) and transcription factor 7-like 2 (TCF7L2). There were 216 T2D patients diagnosed with DN and 178 age-similar T2D without DN (control) subjects. To investigate gene-gene interactions, we employed both generalized multifactor dimensionality reduction (GMDR) method and logistic regression models.

RESULTS:

Single-locus analyses showed significant main effects of ENPP1 (P = 0.0032; adjusted OR = 1.85; 95% CI = 1.17-2.92) on the risk of DN in T2D. Furthermore, a potential gene-gene interaction involving ENPP1 and GHSR was suggested in the best two-locus GMDR model (P = 0.021). The significant three-locus GMDR model (P < 0.001) was also identified among ADIPOQ, GHSR and TCF7L2. Analyses using logistic regression models confirmed the gene-gene interactions.

CONCLUSIONS:

The results suggest that the SNPs from the T2D-related genes may contribute to the risk of DN in T2D independently and/or in an interactive manner in Taiwanese T2D patients.
Selo DaSilva