A Clinical Trial forMetastatic Castration-Resistant

Prostate Cancer

In this brochure, you will learn about Metastatic Castration-Resistant Prostate Cancer and a clinical trial for this disease. This clinical trial is trying to find out if the combination of two investigational medications can help stop or slow down this type of prostate cancer.

What is Metastatic Castration-Resistant Prostate Cancer (mCRPC)? Metastatic prostate cancer is cancer that has spread beyond the prostate. Metastatic Castration-Resistant prostate cancer is metastatic prostate cancer that has progressed after hormone therapy alone. It’s called mCRPC for short.

Male hormones (such as testosterone) help prostate cancer grow, so men with metastatic prostate cancer usually get hormone therapy as their first treatment. This treatment aims to lower the body’s levels of male hormones to shrink the cancer in the prostate and other areas where it has spread. This usually helps stop the disease from spreading, sometimes for years.

However, prostate cancer eventually grows and requires more treatments to help stop the disease again. This is when the prostate cancer is called mCRPC.

Your treatment options: If you have mCRPC, your cancer care team will discuss your treatment options with you and those close to you. Your options will depend on several things: • The stage of your cancer, which tells you if it has spread and if so,

how far • Your overall health • Chance of the cancer coming back • Side effects you might have from the treatment • What chance the treatment has of reducing or removing the disease • How long the treatment might help extend your life • How much the treatment might help reduce your symptoms

Your care team may offer you one or more of these options: • Abiraterone acetate and prednisone – lowers hormone

production in the body• Enzalutamide – lowers hormone production in the body• Radium-223 – for men with cancer that has spread to the bone

• Sipuleucel-T – for men who have few or no symptoms from the cancer

• Chemotherapy – uses medicines that directly kill the cancer cells in your body

• Docetaxel and prednisone • Cabazitaxel and prednisone – for men with prostate cancer

that has worsened while on docetaxel• Clinical trials, such as this one

What is a clinical trial? Clinical trials are research studies that help doctors find out if study drugs (alone or with other treatments) are safe and if they can help prevent, find, or treat diseases or other conditions.

This clinical trial will include people with mCRPC that: • Had prostate cancer progression while on androgen deprivation

therapy (ADT) or following bilateral orchiectomy• Have received prior treatment with either abiraterone acetate or

enzalutamide (but not both) • Have received no more than 1 previous chemotherapy regimen

for mCRPC

Deciding to join a clinical trial is something only you, those close to you, and your doctors and nurses can decide together.!

All about this clinical trial

Why is this study being done?This study is trying to find out if a combination of two investigational medications is safe and works to slow down or stop the growth of mCRPC compared to the standard of care. Researchers don’t know if these investigational medications work to treat this type of cancer.

The treatments being studied:The treatments being studied are called Pembrolizumab and Olaparib. Pembrolizumab is a type of immunotherapy, which may help the body’s immune system attack cancer cells. This immunotherapy is FDA approved to treat other types of cancer but is not approved to treat mCRPC. Olaparib is a targeted therapy called a PARP inhibitor that may help limit a cancer cell’s ability to repair itself and can lead to death of the cancer cells. Before deciding to participate, you should make sure you understand the potential side effects or risks of participating in the study. These will be explained to you by the study doctor. If there is anything you do not understand; you are encouraged to ask the study doctor.

About pembrolizumab:1. A protein called PD-1 (on some of your immune system cells)

sometimes binds with certain molecules called ligands (on some cancer cells)

2. When these 2 bind, it turns off the immune system cell, which means it can’t do its work to help protect you and attack cancer cells

3. This is where Pembrolizumab comes in - this study drug binds with PD-1 and blocks PD-1 from binding with ligands

4. By blocking PD-1 from binding with ligands, Pembrolizumab may help the immune system stay on so it can find and attack cancer cells

Another way to think about the treatment

When PD-1 and ligands bind, it’s like turning off the immune cell. This means that the immune cell will not do its work to attack cancer cells.

This clinical trial is studying whether pembrolizumab can block PD-1 and ligands from binding so that the immune system cell stays on and can start working.

About Olaparib:In prostate cancer, cells in the prostate grow out of control. This growth creates damage that must be repaired in order for the cancer cells to keep growing. One way to fix this damage is to use PARP, which is an enzyme that has many jobs inside cells – including helping to repair damage. If PARP is allowed to repair damage, cancer cells can survive, and tumors can continue to grow. That is where Olaparib comes in. Olaparib works in 2 ways to help kill cancer cells:1.) Olaparib stops PARP from repairing damage in cancer cells.2.) Olaparib traps PARP on DNA to harm cancer cells.By preventing damage repair and harming cancer cells, Olaparib may help stop the tumor from growing.

Who can join this study?There are certain rules that you must meet in order to join. Your study team will give you certain tests to see if you are eligible for this study.You and your study doctor will discuss the other rules to decide if this study is a good option for you, as well as the possible benefits and risks of joining this study.

If I join, what will happen during study visits?You will visit the study site on a regular schedule so that your doctors can see how the study drug is working for you. During your study visits, you might get:• Blood and urine tests • Physical exams • Research study drugs • Imaging scans such as CT scans or MRIs • Questionnaires to complete about how you feel and are functioning

Ask your doctor any questions about what

happens in the study visits and how often

they will happen?

Your questions and notes

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To learn moreTalk to your study doctor or contact:

If you join the study, your doctor will need to stay in contact with you even after your study visits are over.

This is very important because this clinical trial is studying how well the study drug works over time.

Thank you for thinking about participating in this study. The information presented here is to support your discussions with your doctor about this study. Researchers use clinical trials like this one to learn more about investigational medications. The results of this study will provide additional information about how safe and effective the investigational medication may be in people with your type of prostate cancer.

Copyright © 2019 Merck & Co, Inc., Kenilworth, NJ, USA

MK7339_010_00_Patient Brochure_English_NA_18-Jan-2019