Open AccessThe Loss of Heterozygosity of FHIT Gene in Sporadic Breast Cancer
Author(s) -
Lisiane Silveira Zavalhia,
Andréa Pires Souto Damin,
Grasiela Agnes,
Augusto Ferreira Weber,
Taís Frederes Krämer Alcalde,
Laura Marinho Dorneles,
Guilherme Watte,
Adriana Vial Roehe
Publication year - 2021
Publication title -
journal of oncology research
Language(s) - English
Resource type - Journals
ISSN - 2630-5267
DOI - 10.30564/jor.v3i2.3632
Subject(s) - fhit , loss of heterozygosity , breast cancer , carcinogenesis , tumor suppressor gene , pathological , oncology , cancer , stage (stratigraphy) , biology , proportional hazards model , cancer research , medicine , gene , allele , genetics , paleontology
The loss of heterozygosity (LOH) is a genetic event that can change gene function. FHIT is a potential tumor suppressor gene. Although the precise FHIT molecular mechanism of action is not well understood, evidences suggest that Fhit protein reduced levels are involved in mammary carcinogenesis. The aim of this study was to investigate if FHIT LOH could influence on sporadic breast cancer (BC) biological behavior, through its association with prognostic factors for sporadic BC.Tumor tissue and peripheral blood samples were analyzed using the microsatellite marker D3S1300. The findings were associated with clinicopathological parameters including overall survival. LOH was detected in 31.1%(52/167) of the informative BC’ cases. Considering clinical and pathological characteristics we have found no significant association with FHIT LOH status. The mean follow-up time was 80 months. After the Cox regression analysis two parameters remained associated with BC’s risk of death: TNM stage III and IV - HR = 3.74(95% CI, 1.16-12.1) P=0.027 and disease relapse HR = 3.14(CI 95% 1.26-7.80) P =0.014. This study shows that FHIT LOH by itself is not a prognostic factor for sporadic BC. Further researches are required to elucidate the functional role of FHIT LOH concerning to BC.