The data obtained show that there is no statistically significant change in the level of E2F1 in tumor cells incubated with Lipofectamine, control conjugate 7 and antisense oligonucleotide 4, while in the cells incubated with antimiR-17 conjugate 4, when the reduction in miR-17 level is observed, the level of E2F1 protein increases 2.2-fold as compared with control (Fig. 7C). The gene discussed is E2F1; the disease is neoplasm.