Ultomiris is a long-acting humanized murine monoclonal antibody that is indicated for the treatment of paroxysmal nocturnal hemoglobinuria (PNH). Ultomiris binds with high affinity to the complement protein C5, thereby inhibiting its cleavage of C5a and C5b. This inhibition prevents the generation of the terminal complement complex C5b9, preventing complement-mediated hemolysis in patients with PNH.
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