CD47 and colonic neoplasm: In addition, bispecific anti-PD-L1-SIRPα, both of SIRPα/CD47 and PD-1/PD-L1 checkpoints blockade, significantly enhances CD8+ T cell killing on colon cancer cells compared to SIRPα/CD47 or PD-1/PD-L1 blockade alone, which is involved in activation of STING-IFN-γ pathway in DCs 41.