Roham Soheilian1, Mohammad Hossein Jabbarpour Bonyadi1, Hamidreza Moein1, Mojgan Babanejad2, Alireza Ramezani1,3, Mehdi Yaseri1, Masoud Soheilian4,5. 1. Ophthalmology Department and Ophthalmic Research Center, Labbafinejad Medical Center, School of Medicine, Shahid Beheshti University of Medical Sciences, Pasdaran Ave. Boostan 9 St, 16666, Tehran, Iran. 2. Genetic Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran. 3. Negah Eye Hospital, Tehran, Iran. 4. Ophthalmology Department and Ophthalmic Research Center, Labbafinejad Medical Center, School of Medicine, Shahid Beheshti University of Medical Sciences, Pasdaran Ave. Boostan 9 St, 16666, Tehran, Iran. masoud_soheilian@yahoo.com. 5. Negah Eye Hospital, Tehran, Iran. masoud_soheilian@yahoo.com.
Abstract
PURPOSE: To determine the association of C-reactive protein (CRP) and complement factor H (CFH) gene with exudative age-related macular degeneration (AMD) and any possible interaction among these factors. METHODS: In this case-control study, 139 unrelated patients with exudative AMD and 123 non-AMD controls were recruited. Blood sample was taken for analysis of the CRP levels and DNA testing. DNA fragments of CFH gene variants containing 4 single nucleotide polymorphisms including rs800292, rs1061170, rs2274700, and rs3753395 were assessed. A CRP level of ≥3 mg/L was considered as elevated. The association of elevated CRP and CFH gene variants polymorphism with exudative AMD was compared between the groups. RESULTS: Mean age was 72.6 ± 6.4 for controls and 74.9 ± 7.4 for case group (P = 0.006). The difference between CRP levels in cases and controls was not statistically significant (P = 0.055). However, Y402H variant of CFH in both homozygous and heterozygous carriers C allele was significantly more frequent among exudative AMD patients than controls, 32.1 versus 6.5 % (P < 0.001). Evaluating various CRP levels in patients with CC and non-CC genotypes disclosed that in CC genotype group, higher CRP level (>3 mg/L) was associated with higher risk of developing exudative AMD (OR = 12.0, CI: 1.5-98.8) compared with the control group. CONCLUSION: This study disclosed no difference in CRP levels per se between exudative AMD patients with control group. However, higher levels of CRP in the presence of C allele of Y402H might confer more risk for the development of exudative AMD.
PURPOSE: To determine the association of C-reactive protein (CRP) and complement factor H (CFH) gene with exudative age-related macular degeneration (AMD) and any possible interaction among these factors. METHODS: In this case-control study, 139 unrelated patients with exudative AMD and 123 non-AMD controls were recruited. Blood sample was taken for analysis of the CRP levels and DNA testing. DNA fragments of CFH gene variants containing 4 single nucleotide polymorphisms including rs800292, rs1061170, rs2274700, and rs3753395 were assessed. A CRP level of ≥3 mg/L was considered as elevated. The association of elevated CRP and CFH gene variants polymorphism with exudative AMD was compared between the groups. RESULTS: Mean age was 72.6 ± 6.4 for controls and 74.9 ± 7.4 for case group (P = 0.006). The difference between CRP levels in cases and controls was not statistically significant (P = 0.055). However, Y402H variant of CFH in both homozygous and heterozygous carriers C allele was significantly more frequent among exudative AMDpatients than controls, 32.1 versus 6.5 % (P < 0.001). Evaluating various CRP levels in patients with CC and non-CC genotypes disclosed that in CC genotype group, higher CRP level (>3 mg/L) was associated with higher risk of developing exudative AMD (OR = 12.0, CI: 1.5-98.8) compared with the control group. CONCLUSION: This study disclosed no difference in CRP levels per se between exudative AMDpatients with control group. However, higher levels of CRP in the presence of C allele of Y402H might confer more risk for the development of exudative AMD.
Authors: Robert J Klein; Caroline Zeiss; Emily Y Chew; Jen-Yue Tsai; Richard S Sackler; Chad Haynes; Alice K Henning; John Paul SanGiovanni; Shrikant M Mane; Susan T Mayne; Michael B Bracken; Frederick L Ferris; Jurg Ott; Colin Barnstable; Josephine Hoh Journal: Science Date: 2005-03-10 Impact factor: 47.728
Authors: F Simonelli; G Frisso; F Testa; R di Fiore; D F Vitale; M P Manitto; R Brancato; E Rinaldi; L Sacchetti Journal: Br J Ophthalmol Date: 2006-06-14 Impact factor: 4.638
Authors: Ronald Klein; Barbara E K Klein; Michael D Knudtson; Tien Yin Wong; Anoop Shankar; Michael Y Tsai Journal: Am J Ophthalmol Date: 2005-07 Impact factor: 5.258
Authors: Luba Robman; Paul N Baird; Peter N Dimitrov; Andrea J Richardson; Robyn H Guymer Journal: Ophthalmology Date: 2010-06-03 Impact factor: 12.079