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US FDA grants Fast Track designation to Exelixis’ cabozantinib for RCC treatment
South San Francisco, California | Saturday, April 11, 2015, 13:00 Hrs  [IST]

The US Food & Drug Administration (FDA) has granted Fast Track designation to Exelixis, Inc's cabozantinib for treatment of patients with advanced renal cell carcinoma (RCC) who have received one prior therapy. Cabozantinib is the Exelixis' lead compound and inhibits the activity of multiple tyrosine kinases including MET, VEGFRs and RET.

The FDA created the Fast Track process to facilitate the development and expedite the review of drugs to treat serious diseases and address unmet medical needs. Fast Track designation confers important benefits, including the potential eligibility for Priority Review of a New Drug Application, if relevant criteria are met.

Cabozantinib is the subject of METEOR, an ongoing phase 3 pivotal trial in patients with metastatic RCC who have experienced disease progression following treatment with at least one VEGFR tyrosine kinase inhibitor. Patients are randomized 1:1 to receive 60 mg of cabozantinib daily or 10 mg of everolimus daily. The primary endpoint of METEOR is progression-free survival, and secondary endpoints include overall survival and objective response rate. Exelixis expects to release top-line results from the trial in the second quarter of 2015. In addition to the metastatic RCC development program, Exelixis is also evaluating cabozantinib in CELESTIAL, a phase 3 pivotal trial in second-line hepatocellular carcinoma (HCC).

The American Cancer Society’s 2015 statistics cite kidney cancer as among the top ten most commonly diagnosed forms of cancer among both men and women in the United States. Clear cell renal cell carcinoma is the most common type of kidney cancer in adults. If detected in its early stages, the five-year survival rate for RCC is high; however, the five-year survival rate for patients with advanced or late-stage metastatic RCC is under 10 per cent, with no identified cure for the disease.

Cabozantinib inhibits the activity of tyrosine kinases including MET, VEGFRs and RET. These receptor tyrosine kinases are involved in both normal cellular function and in pathologic processes such as oncogenesis, metastasis, tumor angiogenesis, and maintenance of the tumor microenvironment.

Cometriq (cabozantinib) is currently approved by the US Food and Drug Administration for the treatment of progressive, metastatic medullary thyroid cancer (MTC).

The European Commission granted Cometriq conditional approval for the treatment of adult patients with progressive, unresectable locally advanced or metastatic MTC. Similar to another drug approved in this setting, the approved indication states that for patients in whom Rearranged during Transfection (RET) mutation status is not known or is negative, a possible lower benefit should be taken into account before individual treatment decisions.

Exelixis, Inc. is a biopharmaceutical company committed to developing small molecule therapies for the treatment of cancer.

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