Additionally, the IHC staining assay indicated that the expression levels of Ki67, a nuclear protein that is related to cellular proliferation, were decreased in the subcutaneous tumor tissues of mice in miR-26b-5p overexpression groups compared to control groups, while it showed the opposite result in miR-26b-5p knockdown groups (Fig. 2O). The gene discussed is MKI67; the disease is neoplasm.