Effect of PM2.5 on circRNA expression of HBE cells
To further explore the potential mechanism underlying PM2.5-induced lung tumorigenesis, we performed circRNA sequencing (circRNA-seq) using RNA isolated from control  or chronic PM2.5 exposed HBE cells (control n=3 vs. PM2.5 n=3) Overall design: circRNA-seq of HBE cells with or without chronic PM2.5 treatment