TNFSF10 and colorectal carcinoma: As these CRC cells are also resistant to chemicals (cisplatin, vincristine, doxorubicin, and bortezomib) and TRAIL proteins (TRAIL and IgBD-TRAIL) (Figure S1), extensive sensitization of these cells to TRAIL proteins by PDT suggested the potential of combination therapy of TRAIL proteins and tumor cell-targeted PDT in combating refractory CRC.