Association study of sorbitol dehydrogenase -888G>C polymorphism with type 2 diabetic retinopathy in Caucasian-Brazilians.
Exp Eye Res
; 115: 140-3, 2013 Oct.
Article
em En
| MEDLINE
| ID: mdl-23850972
ABSTRACT
Diabetic retinopathy (DR) is a common chronic complication of diabetes and remains the leading cause of blindness in working-aged people. Hyperglycemia increases glucose flux through the polyol pathway, in which aldose reductase converts glucose into intracellular sorbitol, which is subsequently converted to fructose by sorbitol dehydrogenase (SDH). The accelerated polyol pathway triggers a cascade of events leading to retinal vascular endothelial dysfunction and the eventual development of DR. Polymorphisms in the gene encoding aldose reductase have been consistently associated with DR. However, only two studies have analyzed the relationship between polymorphisms in the gene encoding SDH (SORD) and DR. In this case-control study, we investigated whether the -888G > C polymorphism (rs3759890) in the SORD gene is associated with the presence or severity of DR in 446 Caucasian-Brazilians with type 2 diabetes (241 subjects with and 205 subjects without DR). The -888G > C polymorphism was also examined in 105 healthy Caucasian blood donors, and the genotyping of this polymorphism was carried out by real-time PCR. The genotype and allele frequencies of the -888G > C polymorphism in patients with type 2 diabetes were similar to those of blood donors (G allele frequency = 0.16 in both groups of subjects). Similarly, the genotype and allele frequencies in patients with DR or the proliferative form of DR were similar to those of patients without this complication (P > 0.05 for all comparisons). Thus, our findings suggest that the -888G > C polymorphism in the SORD gene is not involved in the pathogenesis of DR in type 2 diabetes.
Palavras-chave
AGEs; AR; Advanced glycation end-products; Aldose reductase; DR; Diabetic retinopathy; NPDR; Non-proliferative diabetic retinopathy; OR; Odds ratio; PDR; PKC; Proliferative diabetic retinopathy; Protein kinase C; SDH; SORD; Sorbitol dehydrogenase; diabetic retinopathy; gene encoding sorbitol dehydrogenase; polymorphism; polyol pathway; sorbitol dehydrogenase; type 2 diabetes
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Polimorfismo de Nucleotídeo Único
/
População Branca
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Diabetes Mellitus Tipo 2
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Retinopatia Diabética
/
L-Iditol 2-Desidrogenase
Tipo de estudo:
Observational_studies
/
Risk_factors_studies
Limite:
Adult
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Female
/
Humans
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Male
/
Middle aged
País/Região como assunto:
America do sul
/
Brasil
Idioma:
En
Ano de publicação:
2013
Tipo de documento:
Article