GPT and steatosis: Interestingly, compared with rabbit IgG-treated control mice, mice receiving anti-AsGM1 antibody displayed decreased serum alanine aminotransferase (ALT) levels but higher hepatic triglyceride (TG) levels, accompanied with pan-lobular steatosis stained with hematoxylin and eosin (H&E) 9 h after gavage (Figures 1B–D), indicating that NK cells play both a protective role against steatosis and a stimulatory role in hepatocyte injury.