Abbreviations: CPPO: hydrophobicbis (2,4,5-trichloro-6-carbopentoxyphenyl) oxalate; Ce6: chlorin e6; siPDL1: siRNA against PD-L1; ESCs: embryonic stem cells; MSC: mesenchymal stem cells; BMSC: bone marrow MSC; PTX: paclitaxel; HMOX1: heme oxygenase-1; HSSP: HMOX1 specific short peptide...