PRDM9 and breast cancer: However, in addition to the beneficial effects regarding BC carcinogenesis, the “viral mimicry” method has challenges since a number of scientific articles have proven the role of activation of HERVs, LINE1s, and Alus in the carcinogenesis of BC, which indicates a possible stimulation of BC growth under the influence of inhibitors of DNA methyltransferases, histone deacetylases and histone methyltransferases.