This study involves people with metastatic prostate cancer, which means the cancer has spread from the prostate to other parts of the body. The study will test a medicine called AZD0516, which is given through a vein as an infusion, and another medicine called AZD9574, which is taken by mouth as a tablet. These medicines will be tested either alone or together with other cancer treatments. AZD0516 is an antibody-drug conjugate, which is a type of medicine that combines an antibody with a cancer-fighting drug. AZD9574 is a medicine that can reach the brain and works by blocking certain proteins called PARP1 that help cancer cells repair themselves.
The purpose of this study is to find out if these medicines are safe, how well they are tolerated by the body, and whether they can help fight the cancer. The study will also look at how the body processes these medicines and what effects they have on tumor growth. Doctors will measure a substance in the blood called PSA, which is a marker often used to monitor prostate cancer, to see if the treatment is working. They will also use imaging scans to check if the tumors are getting smaller or stopping their growth.
The study is divided into different parts. In the first part, different doses of the medicines will be tested to find the safest and most effective amount to give. In the second part, doctors will further test the chosen doses to see how well they work against the cancer. In the final part, the study will focus on checking how effective the treatment is in a larger group of people. Throughout the study, participants will have regular check-ups including blood tests, physical examinations, and scans to monitor their health and how the cancer is responding to treatment. Participants must have already received standard treatments for their prostate cancer or have a reason why standard treatments are not suitable for them.



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