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Abstract #53694 Published in IGR 15-2
Association of Mn-SOD Mutation (c.47T > C) with Various POAG Clinical Indices
Abu-Amero KK; Kondkar AA; Mousa A; Osman EA; Al-Obeidan SAOphthalmic Genetics 2014; 35: 85-90
BACKGROUND: To investigate whether the c.47T > C mutation in the manganese superoxide dismutase gene (Mn-SOD) is a risk factor for primary open angle glaucoma (POAG) in the Saudi population. MATERIALS AND METHODS: A cohort of 226 unrelated POAG patients and 403 unrelated control subjects from Saudi Arabia were genotyped for a single nucleotide polymorphism (SNP; rs4880; c.47T > C) utilizing Taq-Man® assay ID: C_8709053_10. The association between mutant genotypes and various clinical indices important for POAG was also investigated. RESULTS: Among cases, the prevalence of the wildtype genotype (T/T) was 22.1% (50/226), while the heterozygous mutated genotype (T/C) was 50.9% (115/226) and the homozygous mutant genotype (C/C) was 27% (61/226). There were no statistically significant differences between cases and controls in terms of the genotype distribution on both heterozygous mutant (p = 0.916) and homozygous mutant (p = 0.988) genotypes. POAG patients with the mutant genotypes had slightly higher intraocular pressure (IOP) than controls. Additionally, patients with T/C genotype had slight elevation of the cup/disc ratio than the normal group. Additionally, the age at onset of disease showed an increasing trend with severity of mutation where it increases across groups T/T, T/C, and C/C being at [48.9 (±16.3), 51.4 (±12.2), and 56.5 (±13.9)] respectively and a p value of 0.028 for the C/C genotype. CONCLUSIONS: This mutation could be associated with various clinical indices important for POAG. If similar findings were found in other populations and larger cohorts, then this SNP may be used as a marker for assessing the severity of the disease.
Department of Ophthalmology, College of Medicine, King Saud University , Riyadh , Saudi Arabia and.
Full articleClassification:
3.4.2 Gene studies (Part of: 3 Laboratory methods > 3.4 Molecular genetics)
