Prostate Cancer and Tumor Microenvironment

Prostate cancer (PCa) is the most frequently detected malignancy among males on a global scale. Notwithstanding their initial susceptibility to androgen restriction, individuals afflicted with advanced disease inevitably acquire refusal to treatment and may succumb to metastatic castration-resistant prostate cancer (mCRPC). One of the primary difficulties encountered in the therapy of PCa is the presence of clinical heterogeneity, which poses a significant difficulty due to its unpredictable nature and the limitations of currently available biomarkers in accurately predicting its occurrence. There exists a substantial unmet need to establish precise molecular biomarkers for PCa that can effectively contribute to the diagnosis process and differentiate patients who would benefit from intensive therapy from people who would be better off avoiding excessive treatment. The etiology of PCa extends beyond the cancerous epithelial cells and encompasses the intricate interplay between these cells and the surrounding tumor microenvironment. The interaction between stroma and epithelial cells in prostate cancer has been demonstrated to have a significant impact on the advancement of the illness and its spread to other parts of the body. Several important indicators of reactive stroma have been found, including markers for stem/progenitor cells, inflammatory mediators originating from stromal cells, connective tissue growth factors, regulators of angiogenesis, wingless homologs (Wnts), and integrins. In this chapter, we present a summary of the intercommunication between stromal and epithelial cells in PCa, with a specific emphasis on the molecular biomarkers associated with the tumor microenvironment. We explore the significance of these biomarkers in the areas of diagnosis, prognosis, and the advancement of therapeutic strategies.