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Wnt3a activates β-catenin transcriptional activity time dependently in CP-A cells: (A) Luciferase assay and (B) qRT-PCR analysis of AXIN2 and Dkk1 mRNA expression in CP-A cells following treatment with 200 ng/ml of rhWnt3a for 3, 6, 12, and 24 hours (*P < .05; t test).
