PECAM1 and neoplasm: The hydrogel loaded withboth Dox and cGAMPnps (Dox-cGAMPnp@Gel) normalized tumor vasculaturesin 4T1 tumors indicated by increased pericyte coverage of tumor vessels(NG2+ CD31+), compared with cGAMPnps or Doxalone in the hydrogel (Figure 6B).