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Proteolysis-TArgeting Chimeras (PROTACs) technology, as a strategy to chemically knock down transcription factors at the protein levels, can hijack the ubiquitin-proteasome degradation system to initiate the intracellular ubiquitin-proteasome hydrolysis process to degrade proteins. In the past, the development of drugs that target transcription factors has been greatly restricted, and even historically transcription factors have been regarded as "undruggable targets". PROTAC technology breaks through this limitation with its unique targeting design. With several generations of technical innovation, PROTACs have become more mature and continue to make breakthroughs in the field of targeted therapy including prostate cancer (PCa), with a new strategy for the development of anti-tumor targeted drugs. PROTACs have all the advantages of existing small molecule inhibitors, are easy to administer orally, have good cell permeability, and have wider targeting profiles compared to conventional inhibitors. The disadvantage of PROTACs is the noncancer specificity, off-target and sustained-release control, due to its catalytic role. Some androgen receptor (AR) and CDK4/6 degraders have advanced the field of PCa treatment, which is being further modified given the effects of these degraders in preclinical and clinical studies. This review summarizes in detail the technological progress and challenges that have been faced with PROTACs, the progress of research on PCa, and the prospective future of PROTACs development.

A narrative review of proteolytic targeting chimeras (PROTACs): future perspective for prostate cancer therapy