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BRCA1 and TP53 Gene-Mutations: Family Predisposition and Radioecological Risk of Developing Breast Cancer

  • Apsalikov, Bakytbek (Semey State Medical University) ;
  • Manambaeva, Zukhra (Semey State Medical University) ;
  • Ospanov, Erlan (Semey State Medical University) ;
  • Massabayeva, Meruyert (Semey State Medical University) ;
  • Zhabagin, Kuantkan (Semey State Medical University) ;
  • Zhagiparova, Zhanar (Semey State Medical University) ;
  • Maximov, Vladymir (Laboratory of molecular genetic studies of therapeutic diseases, Federal state scientific institution, Institute of therapy and preventive medicine) ;
  • Voropaeva, Elena (Laboratory of molecular genetic studies of therapeutic diseases, Federal state scientific institution, Institute of therapy and preventive medicine) ;
  • Apsalikov, Kazbek (Research Institute of Radiation medicine and Ecology) ;
  • Belikhina, Tatiana (Research Institute of Radiation medicine and Ecology) ;
  • Abdrahmanov, Ramil (Kazakh National Institute of Oncology and radiology) ;
  • Cherepkova, Elena (Laboratory of affective, cognitive and translational neuroscience of the Federal state budgetary scientific institution, Scientific-research institute of physiology and fundamental medicine) ;
  • Tanatarov, Sayat (Semey State Medical University) ;
  • Massadykov, Adilzhan (Ust-Kamenogorsk Oncology Center) ;
  • Urazalina, Naylia (Semey State Medical University)
  • Published : 2016.08.01

Abstract

Frequencies of polymorphisms of genes BRCA1 and ТР53 in breast cancer (BC) patients with a BC family history and radiation history were assessed and compared in the Semey region of Kazakhstan. The study included 60 women directly irradiated by the activities of the Semipalatinsk test site with a calculated effective equivalent dose of 500 mSv and their first generation descendants (group BC+Her+Exp); 65 women with family BC and absence of radiological history - the effective equivalent dose due to anthropogenic sources not exceeding 50 mSv (group BC+Her-Exp). The comparison group consisted of 65 women patients with breast cancer without family and radiological history (BC-Her-Exp). The control group comprised 60 women without breast cancer and without family and radiological history (nonBC). We carried out the genotyping of the polymorphisms c.2311T>C, c.4308T>C and 5382insC of the BRCA1 gene and rs1042522 of the ТР53 gene. The frequency of the polymorphism c.2311T>C was significantly higher in patients of the group BC+Her+Exp than in healthy women, and of the polymorphism 5382insC in BC+Her+Exp compared to all other groups. The frequency of the rs1042522 polymorphism of ТР53 was significantly higher in all groups of patients with breast cancer compared with the control group. Differences between groups of women with breast cancer were significant only in BC+Her+Exp vs. BC+Her-Exp. Combinations of polymorphisms of the genes BRCA1 and TP53 predominated in women with a family and radiological history.

Keywords

Breast cancer;TP53;BRCA1;polymorphism;radiation factor;the Semipalatinsk test site

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