CD4 and neoplasm: Further, compared to the oe‐NC+M2pep‐Cs NPs/Plerixafor group, the number of CD4+ T cells and CD8+ T cells was significantly decreased in the tumor tissues of mice in the oe‐CXCR4+M2pep‐Cs NPs/Plerixafor group (Figure S13B, Supporting Information).