In this study, immunohistochemical detection of Ki-67 in the transplanted tumor tissues of the two groups showed that the expression of Ki-67 in siDKC1 group was significantly lower than that in NC group (Figure 3(c) and 3(e)), and downregulation of DKC1 expression could inhibit the expression of Ki-67 and tumor proliferation. The gene discussed is MKI67; the disease is neoplasm.