FABP1 and metabolic dysfunction-associated steatotic liver disease: Wu et al. also reported that liver fatty acid binding protein (FABP1) is dramatically expressed in the sera of HBV-infected patients and in both sera and liver tissues of HBV Tg mice, and may play a role in HBx-induced hepatic lipid accumulation via regulation of HNF3β, C/EBPα, and PPARα in the development of HBV-induced nonalcoholic fatty liver disease [41].