title: No association of complement factor H gene polymorphism and age-related macular degeneration in the Japanese population.
abstract: OBJECTIVE
  The aim of this study was to determine whether genetic polymorphism of complement factor H (CFH) is associated with age-related macular degeneration (AMD) in the Japanese population.
  
  
  METHODS
  Genomic DNA was examined in a cohort of 67 Japanese patients with AMD and 107 controls. TT/TC/CC genotypes on exon 9 were screened for sequence alternation by polymerase chain reaction analysis and through sequencing.
  
  
  RESULTS
  The mean ages +/- SD of AMD patients and control subjects were 73 +/- 8.5 years and 72 +/- 8.7 years, respectively. There was no significant difference between CFH genotypes in the AMD group (TT, 76%; TC, 19%; CC, 5%) and the control group (TT, 80%; TC, 17%; CC, 3%). The frequencies of T and C alleles were 86% and 14%, respectively, in the AMD group and 89% and 11%, respectively, in the control group.
  
  
  CONCLUSIONS
  CFH gene polymorphism is not associated with AMD in the Japanese population. Moreover, the frequency of the C allele is low among the Japanese population.
authors.affiliation: Department of Ophthalmology and Visual Science, Graduate School of Biomedical Sciences, Hiroshima University, Hiroshima, Japan.
authors.forename: Junko
authors.initials: J
authors.lastname: Uka
authors.forename: Hiroki
authors.initials: H
authors.lastname: Tamura
authors.forename: Takayuki
authors.initials: T
authors.lastname: Kobayashi
authors.forename: Ken
authors.initials: K
authors.lastname: Yamane
authors.forename: Hideshi
authors.initials: H
authors.lastname: Kawakami
authors.forename: Atsushi
authors.initials: A
authors.lastname: Minamoto
authors.forename: Hiromu K
authors.initials: HK
authors.lastname: Mishima
mesh_terms: D000368:Aged; D000483:Alleles; D044466:Asian People / Q000235:genetics; D017242:Complement Factor H / Q000235:genetics; D004252:DNA Mutational Analysis; D005260:Female; D005838:Genotype; D006801:Humans; D007564:Japan / Q000208:ethnology; D008268:Macular Degeneration / Q000235:genetics*; D008297:Male; D016133:Polymerase Chain Reaction; D011110:Polymorphism, Genetic
chemical_list: C493495:CFH protein, human; D017242:Complement Factor H