The luciferase assay was performed in NIH3T3 Shh-Light II cells, stably incorporating a Gli-responsive luciferase reporter and the pRL-TK Renilla (normalisation control). The Shh-Light II cells were cultured in DMEM plus 10% FBS and then treated for 48 h with SAG alone (200 nM, Alexis Biochemicals, Farmingdale, NY) or in combination with GANT61 or GANT61-D.
Luciferase and Renilla activity were assayed with a dual-luciferase assay system according to the manufacturer’s instruction (Biotium Inc., Hayward, CA). Results are expressed as luciferase/Renilla ratios and represent the mean ± SD of three independent experiments, each performed in triplicate.
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