Foxy 5 is a formylated hexapeptide derived from the sequence of the Wnt5a ligand which acts as a Wnt5a mimetic. Foxy 5 is able to mimic important effects exerted by the full Wnt5a molecule such as binding to the Frz-5 receptor, and reproducing Wnt5a induced inhibition of human breast cancer cell migration in vitro. Foxy 5 significantly reduces the metastatic spread of WNT5a low DU145 prostate cancer cells in an in vivo orthotopic xenograft mouse model.