APOC2 and pneumocystosis: Not only did PCP increase liver lipid transportation to the blood by enhancing the expression of genes involved in lipid transportation, such as solute carrier family 27 member 4 (Scl27a4), apolipoprotein C2 (Apoc2), and CD36 (a fatty acid translocase), but it could also promote glucose metabolism through enhancing glucose oxidative utilization.