Comparison of the therapeutic potential of exosomes derived from different cells for the treatment of prostate cancer.

Prostate cancer (PCa) is a primary cause of male cancer death, underlining the crucial need for new therapies. Natural nanovesicles known as exosomes (EXOs) have shown great promise as therapeutic vectors due to their excellent biocompatibility, minimal immunogenicity, and inherent capacity to carry bioactive cargo. Different cell types may produce these vesicles, and each one imparts unique biological characteristics and therapeutic processes. This review compares the therapeutic potential of EXOs obtained from three primary sources for the treatment of PCa. The usefulness of mesenchymal stem cell-derived EXOs (MSC-EXOs), which leverage their inherent tumor tropism to serve as naturally occurring delivery vehicles for therapeutic agents, is critically examined. We investigate the potential of immune cell-derived EXOs (IC-EXOs) as cytotoxic agents or cell-free vaccines that effectively activate anti-tumor immunity. We also discuss the paradoxical role of tumor-derived EXOs (TEXs), which can serve as vaccine antigens or as tools for liquid biopsy, despite their role in cancer development. We highlight the unique benefits, drawbacks, and best therapeutic settings of these platforms by combining evidence from multiple platforms. Lastly, we address crucial clinical translation issues, such as manufacturing and standardization, and offer a framework for selecting the best EXO source in the evolving field of PCa treatment based on specific therapeutic goals.