title: Association of TGF-beta1 genetic variants with HPV16-positive oropharyngeal cancer.
abstract: OBJECTIVE
  Transforming growth factor-beta1 (TGF-beta1) plays an important role in inflammation and immune responses, which control the human papillomavirus (HPV) clearance and escape of immune surveillance, and may contribute to genetic susceptibility to HPV16 infection.
  
  
  METHODS
  In this case series study, we analyzed the HPV16 status in tumor specimens and genotyped three TGF-beta1 polymorphisms using genomic DNA from the blood of 200 squamous cell carcinoma of the oropharynx (SCCOP) cases. We calculated odds ratio (OR) and 95% confidence intervals (95% CI) in univariate and multivariable logistic regression models to examine the association between the TGF-beta1 polymorphisms and HPV16 status in SCCOP.
  
  
  RESULTS
  Compared with those with the common homozygous genotype, the TGF-beta1 T869C variant genotypes were significantly associated with HPV16-positive tumor status among patients with SCCOP (OR, 1.97; 95% CI, 1.03-3.76), but no significant association was observed for the TGF-beta1 C509T or G915C polymorphism. When all variant genotypes were combined, however, SCCOP patients carrying genotypes with any of these TGF-beta1 variants were more than twice as likely to have an HPV16-positive tumor (OR, 2.28; 95% CI, 1.16-4.50) as patients with no variant genotypes. The stratified analysis showed that those under 54 years of age, non-Hispanic white patients, never smokers, and never drinkers with any variant TGF-beta1 genotypes were also more likely to have HPV16-positive tumors.
  
  
  CONCLUSIONS
  TGF-beta1 polymorphisms may serve as a susceptibility marker for tumor HPV16 status among SCCOP patients, particularly those who were never smokers and never drinkers. Large studies are needed to validate our findings.
authors.affiliation: Departments of Epidemiology, and Head and Neck Surgery, The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, USA.
authors.forename: Xiaoxiang
authors.initials: X
authors.lastname: Guan
authors.forename: Erich M
authors.initials: EM
authors.lastname: Sturgis
authors.forename: Dapeng
authors.initials: D
authors.lastname: Lei
authors.forename: Zhensheng
authors.initials: Z
authors.lastname: Liu
authors.forename: Kristina R
authors.initials: KR
authors.lastname: Dahlstrom
authors.forename: Qingyi
authors.initials: Q
authors.lastname: Wei
authors.forename: Guojun
authors.initials: G
authors.lastname: Li
mesh_terms: D002294:Carcinoma, Squamous Cell / Q000235:genetics* / Q000821:virology; D005260:Female; D020022:Genetic Predisposition to Disease; D005838:Genotype; D052162:Human papillomavirus 16; D006801:Humans; D008297:Male; D008875:Middle Aged; D009959:Oropharyngeal Neoplasms / Q000235:genetics* / Q000821:virology; D030361:Papillomavirus Infections / Q000235:genetics*; D020641:Polymorphism, Single Nucleotide; D053773:Transforming Growth Factor beta1 / Q000235:genetics*
chemical_list: D053773:Transforming Growth Factor beta1