As shown in Fig. 3, cell adhesion molecules (CAMs), neuroactive ligand-receptor interaction, PPAR signalling pathway, glycosaminoglycan biosynthesis-heparan sulfate/heparin, leukocyte transendothelial migration, hepatitis C and phagosome were significantly enriched in the HQR-vs-HBR comparison (P < 0.05). This evidence concerns the gene PPARA and hepatitis C virus infection.