SCAP and lung cancer: Next, to investigate whether all the circRNAs originated from SCAP were downregulated in lung cancer, we searched the circBase database and found that four circRNAs derived from SCAP (hsa_circ_0065201, hsa_circ_0065214, hsa_circ_0065215, and hsa_circ_0065217) were detectable in lung cancer cell line A549.