Simultaneous inhibition of the aryl hydrocarbon receptor (AhR) and SRC abolishing androgen receptor (AR) signaling in prostate cancer cells is disclosed herein as an effective treatment for prostate cancer. Provided herein is a therapeutic composition that comprises an aryl hydrocarbon receptor (AhR) antagonist and an SRC inhibitor. In one embodiment, the therapeutic composition further comprises a pharmaceutical excipient. In one embodiment, the AhR antagonist is CH223191 and the SRC inhibitor is PP2 and the therapeutic composition further comprises a pharmaceutical excipient. Methods of using the therapeutic composition to treat prostate cancer or to inhibit prostate cancer cells are also disclosed.
