title: Homozygosity for the +674C>T polymorphism on VEGF gene is associated with age-related macular degeneration in a Brazilian cohort.
abstract: OBJECTIVE
  To investigate the association between VEGF gene polymorphism and age-related macular degeneration (AMD) in a Brazilian cohort.
  
  
  METHODS
  We examined 160 affected individuals and 140 sex- and age-matched controls recruited at the Vision Institute and the Retina Department, São Geraldo Hospital, Minas Gerais Federal University, Brazil, between 2007 and 2011. Genotyping for the VEGF rs1413711 single nucleotide polymorphism (SNP) (+674C>T) was performed. The incidence rate ratios and 95% confidence interval (CI) for AMD for this genotype was calculated. The odds ratio (OR) was also assessed by using logistic regression, controlling for CFH and LOC387715 risk genotype.
  
  
  RESULTS
  We observed a prevalence of homozygosity (TT genotype) of 18.1% for rs1413711 among AMD cases compared with 5.8% among controls (P < 0.002). The ORs for this polymorphism were 3.6 (95%CI 1.6-8.2) for homozygous subjects and 1.5 (95%CI 1.1-2.1, P < 0.01) if the subject had at least one risk allele. When we studied separately exudative and dry AMD groups, this polymorphism was statistically significant for both groups. Controlling for CFH and LOC387715 risk genotype the OR was 3.0 for VEGF homozygous, and the OR increases if the patient is homozygous for the three genes.
  
  
  CONCLUSIONS
  The present data suggests that VEGF TT genotype is associated with AMD among Brazilian patients.
authors: Department of Ophthalmology, Faculdade de Medicina, Universidade Federal de Minas Gerais, Av. Alfredo Balena 190, Belo Horizonte, MG, Brasil 30130-100. luciananfalmeida@gmail.com
authors: Luciana N
authors: LN
authors: Almeida
authors: Rachel
authors: R
authors: Melilo-Carolino
authors: Carlos E
authors: CE
authors: Veloso
authors: Patrícia A
authors: PA
authors: Pereira
authors: Debora M
authors: DM
authors: Miranda
authors: Luiz Armando
authors: LA
authors: De Marco
authors: Marcio Bittar
authors: MB
authors: Nehemy
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001938:Brazil / Q000453:epidemiology; D005260:Female; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006720:Homozygote; D006801:Humans; D015994:Incidence; D008268:Macular Degeneration / Q000453:epidemiology / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D016017:Odds Ratio; D020641:Polymorphism, Single Nucleotide; D015995:Prevalence; D060888:Real-Time Polymerase Chain Reaction; D042461:Vascular Endothelial Growth Factor A / Q000235:genetics*
chemical_list: C467484:VEGFA protein, human; D042461:Vascular Endothelial Growth Factor A