PPIB and hepatocellular carcinoma: We also infused wild-type (WT) or NEDD4L-KO NK-92 cells into Hu-SRC mice, transplanted B. parabrevis into mouse orthotopic HCC tissues, and then sorted NK cells from HCC tissues to determine whether B. parabrevis inhibited NK cell ferroptosis by upregulating NEDD4L expression (Fig. 3K).