Scientific Reports
Enhanced liver injury and fibrosis markers after anti-PD-1 treatment in an HFD/CCl4-accelerated MASH-fibrosis mouse model
Abstract Immune checkpoint inhibitors show variable efficacy in hepatocellular carcinoma depending on etiology. In metabolic dysfunction-associated steatohepatitis (MASH), PD-1+ CD8+ T cells may paradoxically drive liver injury. We investigated whether PD-1 blockade exacerbates liver fibrosis in a non-neoplastic MASH environment. Male C57BL/6J mice were fed a high-fat diet (HFD) for 18 weeks, with weekly carbon tetrachloride (CCl4) during the final 12 weeks. Mice received anti-PD-1 antibody or isotype control every …