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Fostamatinib : ウィキペディア英語版
Fostamatinib

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Fostamatinib is an experimental drug candidate for the treatment of a variety of diseases, originally developed by Rigel Pharmaceuticals. The drug is administered orally as a disodium salt, and is a prodrug of the active compound tamatinib (R-406), which is an inhibitor of the enzyme spleen tyrosine kinase (Syk).
Fostamatinib has been in phase II trials for rheumatoid arthritis, autoimmune thrombocytopenia and lymphoma.〔
A phase II study of rheumatoid arthritis patients failing to respond to a biologic agent showed little efficacy as compared to placebo, but the drug was well tolerated. In patients with high inflammatory burden, measured by levels of C-reactive protein, ACR20 was achieved by a significantly higher portion of those in the fostamatinib group (42%) versus the placebo group (26%).
On June 4, 2013, Astra Zeneca announced they were giving up future development on the compound, and terminated their license with Rigel after early results from a Phase IIb study for rheumatoid arthritis. Astra Zeneca is estimated to lose $140 million as part of the contract termination.〔Rigel to cut 30 jobs, focus on three drug programs, Sept 5th 2013, http://www.bizjournals.com/sanfrancisco/blog/biotech/2013/09/rigel-fostamatinib-itp-rigl-layoffs.html〕 Rigel is currently conducting two phase III studies on fostamatnib for ITP. Results are expected in the middle of 2016.
==External links==

* Rigel Pharmaceuticals http://www.rigel.com/rigel/ITP

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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