title: Preterm delivery and cytokine gene polymorphisms.
abstract: OBJECTIVE
  To investigate the association of preterm delivery with polymorphisms of IL-6, IL-10, IFN-gamma, TGFbeta1 and TNF-alpha genes.
  
  
  METHODS
  The study group consisted of 45 Caucasian, 81 mixed race and 13 black women with a history of preterm labor, consecutively referred. All of them had delivered before 37 weeks' gestation. The control group was composed of 56 Caucasian, 48 mixed race and 15 black women with successful pregnancy. DNA was extracted from whole blood, and cytokine genotyping was performed using the Cytokine Genotyping Tray (One-Lambda, Canoba Park, California). The polymorphisms analyzed were: TNF-alpha (-08 G --> A), IL-10 (-1082 G --> A), IL-6 (-174 G --> C), TGFbeta1 (+10 T --> C e 25 C --> G) and IFN-gamma (+874 A --> T).
  
  
  RESULTS
  There were no differences in genotype frequencies of IL-10, TGF-beta, TNF-alpha or IL-6 polymorphisms between the groups. In the Caucasian group there was a trend toward increased frequencies of the TT genotype of IFN-gamma in controls.
  
  
  CONCLUSIONS
  Preterm delivery is not associated with TNF-alpha (-308), IL-10 (-1082), IL-6 (-174), TGFbeta1 (+10 e 25) or IFN-gamma (+874) polymorphisms.
authors.affiliation: Department of Obstetrics, Universidade Federal de São Paulo, São Paulo, SP, Brazil.
authors.forename: Rosiane
authors.initials: R
authors.lastname: Mattar
authors.forename: Eduardo
authors.initials: E
authors.lastname: de Souza
authors.forename: Silvia
authors.initials: S
authors.lastname: Daher
mesh_terms: D000293:Adolescent; D000328:Adult; D016207:Cytokines / Q000235:genetics*; D005260:Female; D005838:Genotype; D006801:Humans; D007371:Interferon-gamma / Q000235:genetics; D016753:Interleukin-10 / Q000235:genetics; D008875:Middle Aged; D007752:Obstetric Labor, Premature / Q000208:ethnology / Q000235:genetics* / Q000276:immunology*; D011110:Polymorphism, Genetic / Q000235:genetics*; D011247:Pregnancy; D016212:Transforming Growth Factor beta / Q000235:genetics; D014409:Tumor Necrosis Factor-alpha / Q000235:genetics
chemical_list: D016207:Cytokines; D016212:Transforming Growth Factor beta; D014409:Tumor Necrosis Factor-alpha; D016753:Interleukin-10; D007371:Interferon-gamma