title: Cytotoxic T lymphocyte associated antigen-4 exon 1 A/G polymorphism in Iranian patients with multiple sclerosis.
abstract: BACKGROUND
  Cytotoxic T lymphocyte antigen-4 (CTLA-4) is a T-cell surface receptor of activated T cells.
  
  
  METHODS
  We studied 100 Iranian patients with clinically definite multiple sclerosis (MS) and 100 ethnic, sex- and age-matched controls. CTLA-4 exon 1 A/G polymorphism was compared amongst patients and controls.
  
  
  RESULTS
  There was no statistically significant difference in the allelic [odds ratio (OR): 1.19, confidence interval (CI) 95%: 0.76-1.85, P = 0.4] and genotypes (OR: 1.60, CI 95%: 0.911-2.824, P = 0.102) distribution amongst patients and controls. Also gender, course and progression index did not reveal any statistically significant differences in allele and genotype distribution of A/G polymorphism.
  
  
  CONCLUSIONS
  As a non-European patient population, our results are consistent with the major previous studies showing no significant associations between CTLA4 exon 1 polymorphism and neither MS nor any of its subtypes.
authors.affiliation: Department of Neurology, Shiraz University of Medical Sciences, Shiraz, Iran. borhanihaghighi@yahoo.com
authors.forename: A
authors.initials: A
authors.lastname: Borhani Haghighi
authors.forename: S
authors.initials: S
authors.lastname: Ghahramani
authors.forename: N
authors.initials: N
authors.lastname: Azarpira
authors.forename: M
authors.initials: M
authors.lastname: Pourjafar
authors.forename: A R
authors.initials: AR
authors.lastname: Nikseresht
mesh_terms: D000328:Adult; D015703:Antigens, CD / Q000235:genetics*; D060908:CTLA-4 Antigen; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006801:Humans; D007492:Iran; D008297:Male; D009103:Multiple Sclerosis / Q000235:genetics*; D016133:Polymerase Chain Reaction; D012150:Polymorphism, Restriction Fragment Length; D020641:Polymorphism, Single Nucleotide
chemical_list: D015703:Antigens, CD; D060908:CTLA-4 Antigen; C556706:CTLA4 protein, human