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Home NEWS Science News Health

Targeted drug shows promise in rare advanced kidney cancer

Bioengineer by Bioengineer
June 23, 2017
in Health
Reading Time: 3 mins read
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Credit: Dana-Farber Cancer institute

BOSTON — Some patients with a form of advanced kidney cancer that carries a poor prognosis benefited from an experimental drug targeted to an abnormal genetic pathway causing cancerous growth, according to research led by a Dana-Farber Cancer Institute scientist.

The drug, savolitinib, showed clinical activity in patients with metastatic papillary renal cell carcinoma (PRCC) whose tumors were driven by overactivity of the MET signaling pathway, but was not effective for patients whose tumors lacked the MET abnormality, said the investigators, led by Toni Choueiri, MD, director, Lank Center for Genitourinary Oncology, and director, Kidney Cancer Center, both of Dana-Farber.

These results from a single-arm, multicenter phase II clinical trial, reported in the Journal of Clinical Oncology, suggest that savolitinib holds promise as a personalized treatment for a subgroup of patients with metastatic papillary renal cell carcinoma, the researchers said.

In the US alone, about 6,400 cases of PRCC are expected to be diagnosed in 2017, compared to a total of 64,000 cases of kidney cancers. The majority of them are classified as clear cell renal cell cancers. Papillary renal cell carcinoma are non-clear cell kidney cancers. No good treatments exist for advanced or metastatic PRCC.

The current trial tested savolitinib, a potent and selective MET inhibitor, in 109 patients with locally advanced or metastatic PRCC. Of the 109 patients, 40 percent had tumors driven by MET, 42 percent had tumors that did not rely on MET, and MET status was unknown in 17 percent of patients.

When the results were analyzed, 18 percent of patients with MET-driven cancers had significant shrinkage of their tumors, and 50 percent had stable disease. By contrast, none of the patients with MET-independent tumors had shrinkage response, and only 24 percent had stable disease.

In addition, the length of time after treatment before the cancer began growing was significantly longer in the MET-driven tumor group – 6.2 months versus 1.4 months.

"These data support the hypothesis that savolitinib has antitumor activity in patients with MET-driven papillary renal cell carcinoma," the authors wrote. "Our study identified a defined molecular group and highlights the prevalence of MET-driven disease in this rare population of RCC patients."

Although some patients had their dosage of savolitinib reduced and two patients discontinued treatment because of side effects, the researchers said the drug was generally well-tolerated.

###

About Dana-Farber Cancer Institute

From achieving the first remissions in childhood cancer with chemotherapy in 1948, to developing the very latest new therapies, Dana-Farber Cancer Institute is one of the world's leading centers of cancer research and treatment. It is the only center ranked in the top 4 of U.S. News and World Report's Best Hospitals for both adult and pediatric cancer care.

Dana-Farber sits at the center of a wide range of collaborative efforts to reduce the burden of cancer through scientific inquiry, clinical care, education, community engagement, and advocacy.

Dana-Farber/Brigham and Women's Cancer Center provides the latest in cancer care for adults; Dana-Farber/Boston Children's Cancer and Blood Disorders Center for children. The Dana-Farber/Harvard Cancer Center unites the cancer research efforts of five Harvard academic medical centers and two graduate schools, while Dana-Farber Community Cancer Care provides high quality cancer treatment in communities outside Boston's Longwood Medical Area.

Media Contact

Anne Doerr
[email protected]
617-632-5665
@DanaFarber

http://www.dfci.harvard.edu

############

Story Source: Materials provided by Scienmag

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