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Prevalence of the STK15 F31I polymorphism and its relationship with mammographic density

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Prevalence of the STK15 F31I polymorphism and its relationship with mammographic density

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Título Prevalence of the STK15 F31I polymorphism and its relationship with mammographic density
Autor Giacomazzi, Juliana
Aguiar, Ernestina Silva de
Palmero, Edenir Inêz
Schmidt, Aishameriane Venes
Skonieski, Giovana
Duarte Filho, Dakir Lourenço
Bock, Hugo
Pereira, Maria Luiza Saraiva
Faccini, Lavinia Schuler
Camey, Suzi Alves
Caleffi, Maira
Giugliani, Roberto
Prolla, Patrícia Ashton
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.
Contido em Brazilian journal of medical and biological research = Revista brasileira de pesquisas médicas e biológicas. Ribeirão Preto. Vol. 44, no. 4 (apr. 2011), p. 291-296
Assunto Estatistica : Medicina : Aplicacao
Neoplasias da mama
Polimorfismo
[en] Breast cancer risk
[en] Mammographic density
[en] STK15 F31I polymorphism
Origem Nacional
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/30577
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