title: Prevalence of the STK15 F31I polymorphism and its relationship with mammographic density.
abstract: Several studies have identified the single nucleotide polymorphism STK15 F31I as a low-penetrance risk allele for breast cancer, but its prevalence and risk association in the Brazilian population have not been determined. The goal of this study was to identify the frequency of this polymorphism in the Brazilian setting. Considering the high degree of admixture of our population, it is of fundamental importance to validate the results already reported in the literature and also to verify the relationship between this variant and breast cancer risk. A total of 750 women without breast cancer were genotyped using the TaqMan PCR assay for STK15 F31I polymorphism. Clinical information was obtained from review of the medical records and mammographic density from the images obtained using the BI-RADS System. The estimated risk of developing cancer was calculated according to the Gail model. The genotypic frequencies observed in this study were 4.5, 38.7, and 56.6%, respectively, for the STK15 F31I AA, AT and TT genotypes. The AT and AA genotypes were encountered significantly more often in premenopausal women with moderately dense, dense and heterogeneously dense breast tissue (P = 0.023). In addition, the presence of the TT genotype was significantly associated with age at menarche ≥12 years (P = 0.023). High mammographic density, associated with increased breast cancer risk, was encountered more frequently in premenopausal women with the risk genotypes STK15 F31I AA and AT. The genotypic frequencies observed in our Brazilian sample were similar to those described in other predominantly European populations.
authors.affiliation: Programa de Pós Graduação em Medicina: Ciências Médicas, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brasil.
authors.forename: J
authors.initials: J
authors.lastname: Giacomazzi
authors.forename: E
authors.initials: E
authors.lastname: Aguiar
authors.forename: E I
authors.initials: EI
authors.lastname: Palmero
authors.forename: A V
authors.initials: AV
authors.lastname: Schmidt
authors.forename: G
authors.initials: G
authors.lastname: Skonieski
authors.forename: D
authors.initials: D
authors.lastname: Duarte Filho
authors.forename: H
authors.initials: H
authors.lastname: Bock
authors.forename: M L
authors.initials: ML
authors.lastname: Saraiva-Pereira
authors.forename: L
authors.initials: L
authors.lastname: Schuler-Faccini
authors.forename: S A
authors.initials: SA
authors.lastname: Camey
authors.forename: M
authors.initials: M
authors.lastname: Caleffi
authors.forename: R
authors.initials: R
authors.lastname: Giugliani
authors.forename: P
authors.initials: P
authors.lastname: Ashton-Prolla
mesh_terms: D000328:Adult; D000368:Aged; D064096:Aurora Kinase A; D064127:Aurora Kinases; D001943:Breast Neoplasms / Q000000981:diagnostic imaging / Q000201:enzymology / Q000235:genetics*; D005260:Female; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006801:Humans; D008327:Mammography; D008875:Middle Aged; D016133:Polymerase Chain Reaction; D020641:Polymorphism, Single Nucleotide / Q000235:genetics*; D015995:Prevalence; D017346:Protein Serine-Threonine Kinases / Q000235:genetics*; D012307:Risk Factors
chemical_list: C576917:AURKA protein, human; D064096:Aurora Kinase A; D064127:Aurora Kinases; D017346:Protein Serine-Threonine Kinases