Axitinib
Encyclopedia
Axitinib is a small molecule tyrosine kinase inhibitor under development by Pfizer
Pfizer
Pfizer, Inc. is an American multinational pharmaceutical corporation. The company is based in New York City, New York with its research headquarters in Groton, Connecticut, United States...

. It inhibits multiple targets, including VEGFR-1, VEGFR-2, VEGFR-3, platelet derived growth factor receptor (PDGFR), and cKIT (CD117). It has been shown to significantly inhibit growth of breast cancer in xenograft models and has been successful in trials with renal cell carcinoma
Renal cell carcinoma
Renal cell carcinoma is a kidney cancer that originates in the lining of the proximal convoluted tubule, the very small tubes in the kidney that filter the blood and remove waste products. RCC is the most common type of kidney cancer in adults, responsible for approximately 80% of cases...

 (RCC) and several other tumor types .

A Phase II clinical trial
Clinical trial
Clinical trials are a set of procedures in medical research and drug development that are conducted to allow safety and efficacy data to be collected for health interventions...

 showed good response in combination chemotherapy with Gemcitabine for advanced pancreatic cancer
Pancreatic cancer
Pancreatic cancer refers to a malignant neoplasm of the pancreas. The most common type of pancreatic cancer, accounting for 95% of these tumors is adenocarcinoma, which arises within the exocrine component of the pancreas. A minority arises from the islet cells and is classified as a...

. However, Pfizer reported on January 30, 2009 that Phase III clinical trial
Clinical trial
Clinical trials are a set of procedures in medical research and drug development that are conducted to allow safety and efficacy data to be collected for health interventions...

s of the drug when used in combination with Gemcitabine showed no evidence of improved survival rates over treatments using Gemcitabine alone for advanced pancreatic cancer and halted the trial. http://www.reuters.com/article/marketsNews/idINN3039502020090130?rpc=44

In 2010 a Phase III trial for previously treated metastatic renal cell carcinoma
Renal cell carcinoma
Renal cell carcinoma is a kidney cancer that originates in the lining of the proximal convoluted tubule, the very small tubes in the kidney that filter the blood and remove waste products. RCC is the most common type of kidney cancer in adults, responsible for approximately 80% of cases...

 (mRCC) showed significantly extended progression-free survival when compared to sorafenib
Sorafenib
Sorafenib , is a drug approved for the treatment of primary kidney cancer and advanced primary liver cancer ....

.
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