Targeting the Prostate-Specific Membrane Antigen for Prostate Cancer Therapy

Prostate cancer remains a leading cause of death for men in Western civilization. Despite the effectiveness of surgical prostatectomy, radiotherapy and hormonal therapy, a significant proportion of patients progress to advanced metastatic disease for which there are currently no curative treatment options. Therefore, new therapeutic approaches need to be considered. The prostate-specific membrane antigen is a cell-surface glycoprotein that is highly and specifically expressed on prostate epithelial cells and strongly upregulated in prostate cancer at all stages. These characteristics make it an attractive target for antibody-based imaging and therapies and the first anti-prostate-specific membrane antigen agents have already entered clinical trials. The proposed strategies include targeted toxins and radiotherapeutics as well as immunotherapeutic agents and vaccines.