PPARA and hepatocellular carcinoma: The DEGs were enriched in KEGG pathways involved in metabolic pathways, pancreatic secretion, steroid hormone biosynthesis, herpes simplex infection, chemical carcinogenesis, retinol metabolism, glycerolipid metabolism, protein digestion and absorption, circadian rhythm, PPAR signaling pathway, metabolism of xenobiotics by cytochrome P450, drug metabolism-other enzymes, linoleic acid metabolism, cholesterol metabolism, nicotinate and nicotinamide metabolism, peroxisome, amino sugar, and nucleotide sugar metabolism, fat digestion and absorption, and hepatocellular carcinoma.