Figure 5.

The immunoreaction regulation effect of H₂S. a–c) Images of lung metastases in different groups by a) digital photography and b,c) the corresponding H&E staining of lung tissues on the 35^th day. d) Schematic illustration of H₂S‐regulated immunoreaction. e–i) Flow cytometry plots and related quantification of e–g) MDSCs and h,i) CD4⁺ T cells in tumors treated with PEG–TiS _X NSs. j) Flow cytometry plots and k) related quantification of mature DCs in lymph. l–o) Flow cytometry plots and related quantification of l,m) M1 cells and n,o) M2 cells in tumors treated with PEG–TiS _X NSs. Data are presented as mean values ± SD (n = 5 biologically independent mice).