Abstract

This protocol is for testing responses of a candidate cell line/cell lines to Wnt ligands or Wnt pathway agonists stimulation. This protocol can also be adapted to screen small molecule libraries or biologics that contain activities to either increase or decrease Wnt pathway responses. Canonical Wnt signaling activity transcriptionally induces Wnt target genes that contain concensus TCF/LEF binding element. Wnt pathway activity responsive cells transiently or stably expressing luciferase proteins under the TCF/LEF promoter element can be used to report stimulus-dependent Wnt-pathway activity. We acquired the TopFlash (TCL/LEF-Firefly luciferase) construct from Addgene.

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