Keeping faith with fostamatinib, Rigel submits NDA in rare diseases

18 April 2017

Californian biotech firm Rigel Pharmaceuticals (Nasdaq: RIGL) is renewing its bid to secure regulatory approval in the USA for fostamatinib, this time for a rare autoimmune disorder.

The company originally developed fostamatinib as a treatment for rheumatoid arthritis, but changed course in 2013 after the drug failed to meet its primary endpoint in a pivotal trial.

At that point AstraZeneca (LSE: AZN) cut its losses and returned the rights it had previously acquired to the drug.

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