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New Roswell Park Ovarian Cancer Immunotherapy Study Poses Question: Can Microbiome Influence Treatment Response?
  • USA - English


News provided by

Roswell Park Cancer Institute

Nov 28, 2016, 15:00 ET

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Dr. Emese Zsiros of Roswell Park Cancer Institute
Dr. Emese Zsiros of Roswell Park Cancer Institute

BUFFALO, N.Y. (PRWEB) November 28, 2016 -- A new clinical study underway at Roswell Park Cancer Institute is the first to test the combination of the immunotherapy pembrolizumab with two other drugs as treatment for recurrent epithelial ovarian cancer, and is also the first ovarian cancer clinical trial to incorporate analysis of patients’ microbiomes — the bacteria present in the human gut and other organs.

We’re looking at how to improve our immune defenses to cancer, but we’re looking at it from a variety of angles.

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This new study, led by Principal Investigator Emese Zsiros, MD, PhD, FACOG, Assistant Professor of Oncology in Roswell Park’s Department of Gynecologic Oncology and Center for Immunotherapy, is a phase II clinical trial that will enroll approximately 40 patients with recurrent epithelial ovarian, fallopian tube, or primary peritoneal cancer, and will evaluate the impact of the combination of the PD1-targeting antibody pembrolizumab (Keytruda) with intravenous bevacizumab (Avastin) and oral cyclophosphamide (Cytoxan) on antitumor immune responses and on progression-free survival.

Pembrolizumab has been approved by the U.S. Food and Drug Administration for treatment of advanced melanoma, some metastatic non-small cell lung cancers and recurrent squamous cell head/neck carcinoma, but has only been tested in a small number of ovarian cancer patients, as a single drug and showing modest response. The investigators say a strong scientific rationale supports their hypothesis that the combination of pembrolizumab with two other drugs that have already been approved to treat ovarian cancer — bevacizumab and low-dose oral cyclophosphamide — may have much broader benefit for patients.

“Our biggest hope is that by trying these three drugs in combination, we can significantly extend the lives of patients with recurrent ovarian cancer. We also hope to minimize the side effects associated with chemotherapy drugs, and to markedly improve the quality of our patients’ lives,” says Dr. Zsiros. “We will be looking at potential biomarkers that will tell us who can most benefit from this therapy combination and to better understand how cancer cells and immune cells communicate with one another so that we can design better medications to kill cancer efficiently.“

As part of this study, the clinical team will analyze blood, tumor, stool, vaginal and skin microbiome samples, looking to identify possible associations between these markers with clinical outcomes and tumor response. The study, which is supported by a grant from Merck & Co. Inc., maker of pembrolizumab, will be one of the first to analyze these bacteria to determine possible associations with response to immunotherapeutic agents in patients with cancer.

“We’re looking at how to improve our immune defenses to cancer, but we’re looking at it from a variety of angles,” says Dr. Zsiros. “There’s a whole new area of research suggesting that what’s going on in our gut, our gut flora, has a huge influence on your overall health and happiness, and this study will extend that work into some new directions.”

According to the National Cancer Institute, epithelial ovarian cancer is one of the most common gynecologic malignancies, and is the fifth most frequent cause of cancer death in women.

To learn more about the clinical research study, call 1-877-ASK-RPCI (1-877-275-7724) or send an e-mail to ASKRPCI(at)roswellpark(dot)org. Additional details are available at ClinicalTrials.gov.

For an online version of this release, please visit: https://www.roswellpark.org/media/news/new-ovarian-cancer-immunotherapy-study-poses-question-can-microbiome-influence-treatment

Editor’s note: See a video interview with Emese Zsiros, MD, PhD, FACOG, Principal Investigator of the new study, at https://youtu.be/q-Fi-yxQPNE.

The mission of Roswell Park Cancer Institute (RPCI) is to understand, prevent and cure cancer. Founded in 1898, RPCI is one of the first cancer centers in the country to be named a National Cancer Institute-designated comprehensive cancer center and remains the only facility with this designation in Upstate New York. The Institute is a member of the prestigious National Comprehensive Cancer Network, an alliance of the nation’s leading cancer centers; maintains affiliate sites; and is a partner in national and international collaborative programs. For more information, visit http://www.roswellpark.org, call 1-877-ASK-RPCI (1-877-275-7724) or email askrpci(at)roswellpark(dot)org. Follow Roswell Park on Facebook and Twitter.

Annie Deck-Miller, Roswell Park Cancer Institute, http://roswellpark.org, +1 (716) 845-8593, [email protected]

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