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A Phase II Study of Niraparib in Combination with EGFR Inhibitor Panitumumab in Patients with Advanced Colorectal Cancer

Cancer Type
Unknown Primary
Trial Phase
Phase II
18 Years and older, Male and Female
Study Type
Protocol IDs
Winship4517-18 (primary)
Study Sponsor
Emory University Hospital / Winship Cancer Institute


This phase II trial studies the side effects and how well niraparib and panitumumab work in treating patients with colorectal cancer that has spread to other places in the body. Niraparib may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. Immunotherapy with monoclonal antibodies, such as panitumumab, may help the body’s immune system attack the cancer, and may interfere with the ability of tumor cells to grow and spread. Giving niraparib and panitumumab may work better in treating patients with colorectal cancer.


I. Evaluate the activity of the combination of niraparib with epidermal growth factor receptor (EGFR) Inhibitor panitumumab in previously treated patients with RAS WT metastatic colorectal cancer.

I. Define the toxicity profile of the combination of niraparib and panitumumab. The additional patients enrolled on the expansion cohorts will help confirm the toxicity profile.
II. Evaluate the activity of the combination of niraparib and panitumumab in previously treated patients with metastatic colorectal cancer.

Patients receive niraparib orally (PO) once daily (QD) on days 1-28 and panitumumab intravenously (IV) over 60-90 minutes on days 1 and 15. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity.

After completion of study treatment, patients are followed up at 30 days, every 6 months for 2 years, and then annually for up to 5 years.

Treatment Sites in Georgia

Emory Saint Joseph's Hospital

5665 Peachtree Dunwoody Road NE
Atlanta, GA 30342

Emory University Hospital - Midtown

550 Peachtree Street NE
Atlanta, GA 30308

Winship Cancer Institute of Emory University

1365 Clifton Road NE
Building C
Atlanta, GA 30322

**Clinical trials are research studies that involve people. These studies test new ways to prevent, detect, diagnose, or treat diseases. People who take part in cancer clinical trials have an opportunity to contribute to scientists’ knowledge about cancer and to help in the development of improved cancer treatments. They also receive state-of-the-art care from cancer experts... Click here to learn more about clinical trials.
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