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  • Title: [Association study between diabetic retinopathy and aldose reductase gene polymorphism in Tunisians].
    Author: Zghal-Mokni I, Arfa I, Elloumi-Zghal H, Abid A, Amrouche-Rached C, Kaabi B, Chakroun S, Blousa-Chabchoub S, Gaïgi S, Ayed S, Jeddi A, Dellagi K, Abdelhak S.
    Journal: J Fr Ophtalmol; 2005 Apr; 28(4):386-90. PubMed ID: 15973199.
    Abstract:
    INTRODUCTION: Aldose reductase (ALR2), the enzyme of the polyol pathway, may play an important role in the pathogenesis of diabetic microvascular complications, namely diabetic retinopathy. The study aimed to determine whether the aldose reductase gene is involved in diabetic retinopathy in the Tunisian population. MATERIAL: and methods: A case-control study was conducted in 47 type 2 diabetic patients who have diabetic retinopathy and 28 diabetic patients without diabetic retinopathy in spite of diabetes lasting for more than 5 years and over 10 years in 13 cases. We investigated the association between the (CA)n polymorphism located at 2.1 kb upstream of the transcription start site of ALR2 and diabetic retinopathy. The distribution of genotypes and alleles was compared between cases and controls by chi2 test using Epi info software. RESULTS: Genotyping of the two groups did not demonstrate any association between the alleles of this marker and diabetic retinopathy in the Tunisian population studied. DISCUSSION: An association between one of the alleles (Z - 2) of this microsatellite and diabetic retinopathy was identified in Chinese and Japanese patients with type 2 diabetes. Discordant results were obtained for the different populations studied. The lack of an association between diabetic retinopathy and ALR2 alleles indicates that the ALR2 gene is not a genetic marker of predisposition to diabetic retinopathy for type 2 diabetic patients in the Tunisian population studied.
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