[No authors listed]
PURPOSE:To analyze the association of the polymorphisms of xeroderma pigmentosum complementation group D (XPD) and 8-oxoguanine glycosylase-1 (OGG1) genes with the risk of age-related cataract (ARC) in an Egyptian population. METHODS:This case-control study included 150 patients with ARC and 50 controls. Genotyping of XPD Asp³¹²Asn was performed by amplification refractory mutation system PCR assay and genotyping of OGG1 Ser³²â¶Cys was carried out by PCR including confronting two-pair primers. RESULTS:The Asn/Asn genotype of XPD gene was significantly associated with increased risk of ARC (odds ratio [OR] = 2.74, 95% confidence interval [CI] = 1.01-7.43, p = 0.04) and cortical cataract (OR = 5.06, 95% CI = 1.70-15.05, p = 0.002). The Asn³¹² allele was significantly associated with an increased risk of ARC (OR = 1.75, 95% CI 1.06-2.89, p = 0.03) and cortical cataract (OR = 2.81, 95% CI = 1.56-5.08, p<0.001). The OGG1 Cys/Cys genotype frequency was significantly higher in ARC (OR = 4.13, 95% CI = 0.93-18.21, p = 0.04) and the Cys(³²ⶠallele (OR = 1.85, 95% CI = 1.07-3.20, p = 0.03). Moreover, the Cys/Cys genotype of the OGG1 gene was significantly higher in cortical cataract (OR = 6.00, 95% CI = 1.24-28.99, p = 0.01) and the Cys³²ⶠallele was also significantly associated with cortical cataract (OR = 2.45, 95% CI = 1.30-4.63, p = 0.005). CONCLUSIONS:The results suggest that the Asn/Asn genotype and Asn³¹² allele of XPD polymorphism, as well as the Cys/Cys genotype and Cys³²ⶠallele of the OGG1 polymorphism, may be associated with increased risk of the development of ARC, particularly the cortical type, in the Egyptian population.
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