Cabozantinib
Encyclopedia
Cabozantinib is a small molecule
Small molecule
In the fields of pharmacology and biochemistry, a small molecule is a low molecular weight organic compound which is by definition not a polymer...

 inhibitor of the tyrosine kinases Met
Met
-In the arts:* Metropolitan Opera in Manhattan, New York* Metropolitan Museum of Art in Manhattan, New York* Various buildings known as the Metropolitan Opera House* The Metropolitan Ensemble Theater in Kansas City, Missouri-In computing and the Internet:...

 and VEGFR2, and has been shown to reduce tumor growth, metastasis, and angiogenesis.

It is being developed by Exelixis
Exelixis
Exelixis is a genomics-based drug discovery company located in South San Francisco, Ca. It works on the development of anti-cancer therapies. Exelixis has several compounds in various stages of FDA approval including :...

 Inc.

Cabozantinib was granted orphan-drug
Orphan drug
An orphan drug is a pharmaceutical agent that has been developed specifically to treat a rare medical condition, the condition itself being referred to as an orphan disease...

status by the FDA in January 2011.

It is currently in a number of clinical trials for prostate, ovarian, brain, melanoma, breast, non-small cell lung, hepatocellular, kidney, and medullary thyroid cancer.

Positive data from clinical trials indicate Cabozantinib is particularly beneficial in metastatic advanced prostate cancer. 97% of patients either had stabilization or improvement in bone malignancies. The median time to disease progression was 29 weeks.

One US trial reported in May 2011 : The best results were seen in patients with liver, prostate, and ovarian cancer: 22 of 29 patients with liver cancer, 71 of 100 patients with prostate cancer, and 32 of 51 with ovarian cancer experienced either partial tumor shrinkage or stable disease.
Fifty-nine out of 68 patients who had bone metastases had their metastases shrink or disappear during the trial.

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