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Epstein Barr virus and invasive mammary carcinomas: EBNA, EBERs and molecular profile in a population of West Algeria.

Breast cancer is the common malignancy that affects women worldwide, but conventional risk factors account for only a small proportion of these cases. A possible viral etiology for breast cancer has been proposed and Epstein-Barr virus (EBV) is a widely studied candidate virus. The objective of this study is to determine the association of EBV infection with infiltrating ductal carcinomas (IDC). This descriptive study was carried out in the laboratory of developmental biology and differentiation, from 2012 to 2014. Of 39 cases, we determined the clinicopathological characteristics of the population. Of the 23 cases of IDC, we implemented the techniques Elisa, immunohistochemistry and in situ hybridization. To determine the serological profile, overexpression of onco-proteins EBNA-1, HER2, the mitotic index Ki67 and detection of the presence of the viral genome. The mean age is 57.40±4, SBR II predominates with 70%, pN+ (27%), RE+ (58%), RP+ (52%), HER2 (81%), Luminal A (34%), Luminal B (14%), HER2 (24%), and triple negative (28%). The serological profile of IgG VCA + in IgG EBNA-1 (87%), EBNA-1 P79 (82%) with a positive relationship between the IgG EBNA-1 and EBNA-1 P79 serology profile (p=0.001), HER2 (p=0.003) and with the molecular profile (p=0.051), EBNA-1 overexpression in (13%). The viral genome (EBER) is found in the tumors 43% representing an inverse relationship with the overexpression of Ki67 and a positive relationship with the overexpression of HER2. In our study we found an association with the presence of the EBV virus and the IDC studied.

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