Breast Cancer Risk Associated with Genotype Polymorphisms of the Aurora Kinase a Gene (AURKA): a Case-Control Study in a High Altitude Ecuadorian Mestizo Population

Pathology oncology research: POR

Fabián Oña-Cisneros¹  Alejandro Cabrera-Andrade²  Andrés López-Cortés³  Felipe Rosales⁴ 

[1] Hospital General Docente de Calderón, Ministerio de Salud Pública del Ecuador;Hospital Oncológico Solon Espinosa Ayala;Universidad Tecnológica Equinoccial;Universidad de las Américas

关键词: Breast cancer;    AURKA;    Ecuadorian population;    Genotyping;    High altitude;    Mestizo;   

DOI  :  10.1007/s12253-017-0267-6

学科分类：生理学与病理学

来源: Springer

【 摘 要 】

Breast cancer (BC) is the leading cause of cancer related death among women in 2014. The AURKA gene that encodes the protein called Aurora kinase A plays an important role in the progression of the cell cycle, by controlling and promoting the entry into the phase of mitosis. The single nucleotide polymorphism AURKA T91A (rs2273535) (Phe21Ile) has been identified as functional alternator of this kinase, the Ile allele is associated with the occurrence of chromosome segregation errors and tumor progression. Therefore, it is essential to know how BC risk is associated with histopathological characteristics, immunohistochemical characteristics, and genotype polymorphism in a high altitude Ecuadorian mestizo population. In this retrospective case-control study 200 individuals were analyzed. DNA was extracted from 100 healthy and 100 affected women. Genotypes were determined by genomic sequencing. We found significant association between the AURKA T91A (rs2273535) (Phe21Ile) genotype and an increased risk of BC development: Phe/Ile (odds ratio [OR] = 2.6; 95% confidence interval [CI] = 1.4–4.9; P = 0.004), Ile/Ile (OR = 3.8; 95% CI = 1.6–9.0; P = 0.002), and Phe/Ile + Ile/Ile (OR = 2.9; 95% CI = 1.6–5.2; P = 0.001). Additionally, the rs2273535 variant was associated with the tumor grade SBR III (OR = 9.6; 95% CI = 1.0–91.9; P = 0.048) and the Ki-67 ≥ 20 (OR = 16.5; 95% CI = 2.7–101.3; P = 0.002). In brief, this study provides the first evidence where the Ile allele of the AURKA gene could act as potentially predictive biomarker of BC in the high altitude Ecuadorian mestizo population that lives at 2800 m above sea level (masl).

【 授权许可】

CC BY