CYP1A1 and lung carcinoma: More recently, the circRNA circFLNA has been found to promote lung cancer progression by acting as a sponge of miR-486-3p and thus regulating the XRCC1 (X-ray Repair Cross Complementing 1) and CYP1A1 (Cytochrome P450 Family 1 Subfamily A Member 1) genes (Pan et al., 2022).