Figure 9. The mechanism diagram about impacts of lncRNA PVT1–centered miRNA networks and ozone on asthmatic progression. It was revealed that exposure to ozone impacted Th1/Th2 imbalance of CD4+ T cells by regulating lncRNA PVT1-miR-15a-5p-PI3K/AKT/mTOR axis and apoptosis of ASMCs through modifying lncRNA PVT1-miR-29c-3p- PI3K/AKT/mTOR axis.