Heinsberg

Researchers are evaluating a new form of hormone therapy called ASP5541 for men with advanced prostate cancer that has spread to other parts of the body. This phase 2 study compares ASP5541 given by injection with the standard abiraterone acetate tablets, both combined with a steroid called prednisone or prednisolone. The study aims to assess how well ASP5541 works and its safety in men who have not previously been treated with androgen receptor pathway inhibitors, including specific evaluation in Japanese men. Participants are divided into three groups based on their cancer type and treatment history. ASP5541 is given as a muscle injection every 12 weeks, while abiraterone acetate is taken as a daily tablet. Men with metastatic castration-resistant prostate cancer take prednisone or prednisolone twice daily, and men with metastatic hormone-sensitive prostate cancer take it once daily. All groups also receive standard care such as androgen deprivation therapy. Some participants will monitor blood pressure at home weekly. During the study, men visit the clinic regularly for health checks, safety monitoring, and scans to observe any changes in their cancer. The frequency and type of visits depend on each participants health and treatment stage. Researchers will measure prostate-specific antigen PSA levels, adverse events, physical exams, ECGs, and performance status to evaluate treatment effects and safety. The study may last up to about 3 years for some outcomes, with longer follow-up for certain measures.

Researchers are conducting a prospective, observational study to describe the real-world clinical experience of patients with metastatic castration-resistant prostate cancer mCRPC treated with a combination of olaparib and abiraterone. The study aims to assess clinical outcomes in patients who are either new to novel hormonal agents NHA-naive or have been previously exposed to these agents before starting olaparib plus abiraterone treatment. Patient demographics, clinical characteristics, and treatments before and after olaparib plus abiraterone will also be documented. Participants will be observed from the start of their olaparib plus abiraterone treatment, with no investigational interventions administered by the study team, reflecting real-world treatment usage. The study plans to enroll patients for up to two years and will follow each patient for one year after the last patient begins treatment. The primary outcome measured is the time to treatment discontinuation within 12 months, along with secondary outcomes such as the time to the first subsequent therapy within 24 months. During the study, participants clinical data, treatment histories, and outcomes will be collected and analyzed. There are no specific study visits or procedures imposed beyond routine clinical care. Safety and treatment adherence will be monitored through observational data. Participants are expected to be involved for the duration of their treatment and follow-up, which may extend to approximately three years from enrollment start to last follow-up.