Phase II Success Positions Ra For Potential Blockbuster Opportunity In Myasthenia Gravis
Ra hopes to launch a Phase III program for zilucoplan next year, with a goal of bringing an alternative therapy for MG patients into competition with Alexion’s Soliris.
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Successful Phase III data for UCB’s C5 inhibitor zilucoplan adds to a similarly positive Phase III readout for its rozanolixizumab in December, but details are lacking. UCB is the only company with two mechanisms for MG.
As its acquisition by AstraZeneca moves toward closure, Alexion plans to file the Soliris follow-on for generalized myasthenia gravis in the US, EU and Japan. But potential competition awaits in the C5 inhibitor and FcRn antagonist classes.
The European biotech argenx has reported positive top-line results for its FcRn antagonist efgartigimod in generalized myasthenia gravis in the Phase III ADAPT study, and is planning to market the product itself in the US, Japan and major EU countries.