NOS2 and metabolic dysfunction-associated steatotic liver disease: Among all, the top 5 hub genes identified for NAFLD vs. control were CXCL9, NOS2, SERPINE1, FABP4, and LPL (Figure 1(k)), whereas AKR1D1, UGT2B17, CYP26B1, LIPC, and DGAT2 were identified as the top 5 hub genes for the NAFLD vs. cirrhosis group (Figure 1(l)).