KEGG pathways were largely enriched in cytokine–cytokine receptor interaction, systemic lupus erythematosus, complement and coagulation cascades, PPAR signaling pathway, fat digestion and absorption, tyrosine metabolism, protein digestion and absorption, African trypanosomiasis, drug metabolism–cytochrome P450, pancreatic secretion, retinol metabolism, and metabolism of xenobiotics by cytochrome P450. Here, PPARA is linked to systemic lupus erythematosus.