Prostate cancer (PCa) is a common malignancy in men, necessitating accurate diagnosis and monitoring to ensure effective treatment and prevent early relapse. Radiation therapy (RT) is a standard treatment for localized PCa, effectively targeting cancer cells. However, predictive markers are required to optimize efficacy and long-term monitoring to mitigate the risks of tumor regrowth and metastasis. This study investigated the levels of 14 miRNAs in urinary extracellular vesicles, comparing healthy individuals (HI) to PCa patients, as well as the dynamics of these miRNA levels 1 month and 3 months post-RT. A high diagnostic potential was detected in 42 miRNA ratios that showed significant differences between HI and PCa patients. Additionally, 43 miRNA ratios exhibited significant changes before RT and at 1 and 3 months post-RT. Aberrant miRNA expression was observed, suggesting their utility as biomarkers for diagnosis and prognosis. Dynamic changes in miRNA expression following RT highlight their potential in assessing treatment efficacy and predicting disease progression. However, evaluating the prognostic value of RT-influenced miRNAs requires long-term patient follow-up and retrospective data analysis.
prostate cancer; radiotherapy; miRNA; therapy effectiveness; liquid biopsy; extracellular vesicles; urine