title: Manganese superoxide dismutase and chemokine genes polymorphisms in chinese patients with anterior uveitis.
abstract: OBJECTIVE
  To investigate the association of single-nucleotide polymorphisms (SNPs) in the manganese superoxide dismutase (MnSOD) and two chemokine genes (CCL2 and CCL5) in patients with anterior uveitis (AU).
  
  
  METHODS
  Seventy-nine Chinese patients with acute AU were recruited, and genotyping of four SNPs including MnSOD 47, CCL2 -2518, CCL2 -2076, and CCL5 -403 alleles was performed with SNP genotyping assays. The genotype and allele frequencies were compared between patients with AU and 206 healthy control subjects. Analyses were also stratified according to the HLA-B27 status of the patients.
  
  
  RESULTS
  There were significant increases in the frequency of the AA homozygosity in the MnSOD 47 SNP (P = 0.049) and in the CCL2 -2518G allele frequency and GG homozygosity in patients with AU compared with control subjects (P = 0.017 and P = 0.024, respectively). No significant association was found between AU with the CCL2 -2076 and CCL5 -403 SNPs. Subgroup analyses showed that the MnSOD 47A polymorphism was significantly associated with AU in HLA-B27-positive patients, but not in HLA-B27-negative patients, whereas the CCL2 -2518G polymorphism was significantly associated with AU in HLA-B27-negative patients, but not in HLA-B27-positive patients.
  
  
  CONCLUSIONS
  The 47A polymorphism in the MnSOD gene and the -2518G polymorphism in the CCL2 gene are associated with the development of AU in HLA-B27-positive and -negative Chinese patients, respectively. Further studies to evaluate the interactions of the HLA-B27 status and these SNPs are warranted.
authors.affiliation: Department of Ophthalmology and Visual Sciences, the Chinese University of Hong Kong, Hong Kong.
authors.forename: Chenghong
authors.initials: C
authors.lastname: Lan
authors.forename: Pancy O S
authors.initials: PO
authors.lastname: Tam
authors.forename: Sylvia W Y
authors.initials: SW
authors.lastname: Chiang
authors.forename: Carmen K M
authors.initials: CK
authors.lastname: Chan
authors.forename: Fiona O J
authors.initials: FO
authors.lastname: Luk
authors.forename: Gary K Y
authors.initials: GK
authors.lastname: Lee
authors.forename: Jasmine W S
authors.initials: JW
authors.lastname: Ngai
authors.forename: Jason S S
authors.initials: JS
authors.lastname: Law
authors.forename: Dennis S C
authors.initials: DS
authors.lastname: Lam
authors.forename: Chi-Pui
authors.initials: CP
authors.lastname: Pang
authors.forename: Timothy Y Y
authors.initials: TY
authors.lastname: Lai
mesh_terms: D000208:Acute Disease; D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D044466:Asian People / Q000235:genetics; D016022:Case-Control Studies; D018932:Chemokine CCL2 / Q000235:genetics*; D018946:Chemokine CCL5 / Q000235:genetics*; D005260:Female; D005787:Gene Frequency; D005838:Genotype; D015796:HLA-B27 Antigen / Q000235:genetics; D006801:Humans; D008297:Male; D008875:Middle Aged; D016133:Polymerase Chain Reaction; D020641:Polymorphism, Single Nucleotide; D013482:Superoxide Dismutase / Q000235:genetics*; D014606:Uveitis, Anterior / Q000235:genetics*; D055815:Young Adult
chemical_list: C111835:CCL2 protein, human; C483024:CCL5 protein, human; D018932:Chemokine CCL2; D018946:Chemokine CCL5; D015796:HLA-B27 Antigen; D013482:Superoxide Dismutase