Abstract
Abstract Background: Inhibitor of growth (ING) tumor suppressor gene family has been discovered over the past decade and five different genes have been identified from ING1 to ING5. They have some functions like cell transcription regulation, cell cycle control, DNA repair and apoptosis. Because of the fact that ING3 gene expression has not been studied in breast cancer so far, we aimed to determine whether there was a relationship between ING3 gene expression and breast cancer prognostic factors. Methods: 46 female breast cancer patients in different stages were enrolled to our study. ING3 gene expressions obtained from tumoral and healthy breast tissue samples of patients were evaluated together with pathological and histological parameters. Results: The median age of the patients was 49 years. ING3 expression rate has been significantly higher in the tumor tissue compared to normal tissue and was statistically significant (p=0.001). In estrogen receptor (ER) and progesterone receptor (PR) positive patients, gene expression ratio was significantly higher than negative ones (p<0.001 and p<0.001, respectively). ING3 expression in tumor tissues of the patients with advanced disease (stage 3-4) was detected higher than ones with early stage disease and it was found to be statistically significant at the border (p=0.048). Moreover, there were no significant changes when ING3 gene expressions were compared with c-erbB2 (Receptor tyrosine-protein kinase erbB-2) status and tumor grade (p> 0.05). Conclusions: This study was the first study on ING3 gene expression in breast cancer. ING3 gene expression has been shown to be associated with the receptor positivity and advanced stage disease. Further studies should be conducted on the prognostic significance of ING3 gene in breast cancer. Citation Format: Kalender ME, Cakir M, Ergun S, Oztuzcu S, Cengiz B, Ulasli M, Sevinc A, Camci C. Expression and role of ING3 gene in breast cancer. [abstract]. In: Proceedings of the Thirty-Eighth Annual CTRC-AACR San Antonio Breast Cancer Symposium: 2015 Dec 8-12; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2016;76(4 Suppl):Abstract nr P6-08-08.
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