CD274 and colitis: Compared to PD-L1-Fc/Oxi-αCD nanoparticles-treated mice, the colonic mucosa of colitis mice intraperitoneally injected with PD-L1-Fc or PD-L1-Fc/PLGA nanoparticles showed a decreased fluorescence signal (Fig. 2J and Supplementary Fig. 9A).