ABCB1 and ovarian cancer: Chromatin immunoprecipitation (ChIP) assays in Colo205 transfected with GLI shRNA or in GLI-overexpressing HCT115 cells, which have low GLI levels, evidenced active regulation of ABCB1 and ABCB1 by GLI, as previously described for electromobility shift assay (EMSA) assays in ovarian cancer cells[162].