title: Promoter polymorphism of transforming growth factor-beta1 gene and ulcerative colitis.
abstract: OBJECTIVE
  To elucidate the possible difference in two promoter polymorphisms of the transforming growth factor-beta1 (TGF-beta1) gene (-800G > A, -509C > T) between ulcerative colitis (UC) patients and normal subjects.
  
  
  METHODS
  A total of 155 patients with established ulcerative colitis and 139 normal subjects were selected as controls. Two single nucleotide polymorphisms within the promoter region of TGF-beta1 gene (-509C > T and -800G > A) were genotyped using PCR-RFLP.
  
  
  RESULTS
  There was a statistically significant difference in genotype and allele frequency distributions between UC patients and controls for the -800G > A polymorphism of the TGF-beta1 gene (P < 0.05). The frequency of the TGF-beta1 gene polymorphism at position -800 showed that the AA genotype and the allele A frequencies significantly differed between the patients and healthy controls (P < 0.05). At position -509, there was no statically significant difference in genotype and allele frequency between the patients and control subjects.
  
  
  CONCLUSIONS
  The results of our study indicate that there is a significant difference in both allele and genotype frequency at position -800G > A of TGF-beta1 gene promoter between Iranian patients with UC and normal subjects.
authors.affiliation: Department of Internal Medicine, Namazee hospital, Shiraz, Iran.
authors.forename: B
authors.initials: B
authors.lastname: Tamizifar
authors.forename: K B
authors.initials: KB
authors.lastname: Lankarani
authors.forename: S
authors.initials: S
authors.lastname: Naeimi
authors.forename: M
authors.initials: M
authors.lastname: Rismankar Zadeh
authors.forename: A
authors.initials: A
authors.lastname: Taghavi
authors.forename: A
authors.initials: A
authors.lastname: Ghaderi
mesh_terms: D000328:Adult; D003093:Colitis, Ulcerative / Q000235:genetics*; D005260:Female; D005787:Gene Frequency; D005838:Genotype; D006801:Humans; D007492:Iran; D008297:Male; D008875:Middle Aged; D011110:Polymorphism, Genetic; D011401:Promoter Regions, Genetic / Q000235:genetics; D053773:Transforming Growth Factor beta1 / Q000235:genetics*
chemical_list: D053773:Transforming Growth Factor beta1