AHR and cancer: These data show that CPF inducescell proliferation in MCF-7 andMDA-MB-231 cells after 1 and 14 days of treatment by AhR activationthrough PGE2/Wnt/β-catenin pathway and HSP90 and HSP70 overexpression.These data may help explain the CPF action in the proliferation ofbreast cancer cells.