Fig. 6

Inhibition of androgen receptor (AR) can diminish letrozole-resistant (LetR) cell proliferation and the pro-migratory impact of recombinant human prosaposin (rhPSAP). a Scratch assays were utilised to investigate the impact of rhPSAP on the migratory capacity of aromatase inhibitor (AI)-resistant LetR cells. Anti-AR, bicalutamide (Bica), treatment did not significantly impact on the migratory capacity of AI-resistant LetR cells over 48 hours (i); rhPSAP treatment (10 ng/ml) significantly increased LetR cell migration over 48 hours (ii). Combination treatment with rhPSAP and bicalutamide significantly inhibited rhPSAP-mediated cell migration in AI-resistant LetR cells over 48 hours (iii). b (i) MTS and (ii) colony forming assays were performed to assess the impact of bicalutamide on AI cell proliferation. Treatment of AI-resistant cells with the anti-AR drug, bicalutamide, reduces cell proliferation in LetR. Error bars are representative of mean ± standard error of the mean from three separate experiments. *p <0.05, **p <0.001. VEH vehicle, COMBO combination