In contrast, it is overexpressed in esophageal, lung, and cervical cancer and it appears to promote the growth of cell lines from these cancers; i.e., esophageal (KYSE-150 cells, through NF-κB) (30), lung (A549 cells, through ATP-binding cassette transporter G2) (37), and cervical (M-HeLa) cancer cell lines (32). This evidence concerns the gene ABCG2 and cancer.