title: The (-174) G/C polymorphism in the interleukin-6 gene is associated with risk of papillary thyroid carcinoma in Turkish patients.
abstract: BACKGROUND
  Interleukins and cytokines play an important role in the pathogenesis of many cancers.We aimed to evaluate the interleukin (IL)-6 gene polymorphisms in patients with papillary thyroid carcinoma (PTC) and control subjects.
  
  
  METHODS
  In this study, 42 patients with PTC and 340 healthy controls were included. Peripheral blood samples were taken from control group and patients, and blood samples were preserved at -80 C in tubes containing Na-EDTA.
  
  
  RESULTS
  We also found a statistically significant difference between patients with PTC and the control group with respect to IL-6 genotype (p<0.05). IL-6 gene polymorphism in patients with PTC patients did not reveal statistically significant difference between the 2 groups (size of tumor >1 cm and <1 cm), multicentricity, RET-PTC types and capsule invasion (p>0.05).We also did not find a statistically significant difference between patients with PTC and the control group with respect to IL-6-gene allele frequency (p>0.05).
  
  
  CONCLUSIONS
  Our data suggest that the IL-6 G-174 C polymorphism could play a role in thyroid cancer risk, but there is no effective role as a prognostic factor.
authors.affiliation: Division of Internal Disease, Department of Endocrinology and Metabolism, Ege University, Bornova, Izmir, Turkey.
authors.forename: A G
authors.initials: AG
authors.lastname: Ozgen
authors.forename: M
authors.initials: M
authors.lastname: Karadeniz
authors.forename: M
authors.initials: M
authors.lastname: Erdogan
authors.forename: A
authors.initials: A
authors.lastname: Berdeli
authors.forename: F
authors.initials: F
authors.lastname: Saygili
authors.forename: C
authors.initials: C
authors.lastname: Yilmaz
mesh_terms: D000328:Adult; D000483:Alleles; D002291:Carcinoma, Papillary / Q000235:genetics* / Q000276:immunology; D004247:DNA / Q000737:chemistry / Q000235:genetics; D005260:Female; D020022:Genetic Predisposition to Disease; D014644:Genetic Variation; D005838:Genotype; D006801:Humans; D015850:Interleukin-6 / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D016133:Polymerase Chain Reaction; D012150:Polymorphism, Restriction Fragment Length; D020641:Polymorphism, Single Nucleotide; D018709:Statistics, Nonparametric; D013964:Thyroid Neoplasms / Q000235:genetics* / Q000276:immunology; D014421:Turkey
chemical_list: D015850:Interleukin-6; D004247:DNA