MKI67 and neoplasm: The immunohistochemistry (IHC) staining of tumor slides also indicates that the NPs(si‐1) treatment followed by radiation is the most effective in inhibiting tumor growth, as demonstrated by low lncAFAP1‐AS1 expression, more DNA damage (γH2AX) and apoptosis (caspase 3), and less proliferation (Ki67) (Figure 6E; and Figure S17, Supporting Information).