CD274 and autoimmune hepatitis: Importantly, using a mouse model of concanavalin A (ConA)-induced autoimmune hepatitis, we revealed that WJ-MSCs with high expression of PD-L1 (PD-L1high WJ-MSCs) produced better therapeutic efficacy and stronger immunosuppression compared to PD-L1low WJ-MSCs by altering T subset proliferation and reducing inflammation.