Paroxysmal nocturnal hemoglobinuria (PNH) is a rare acquired hematologic disease characterized by hemolysis, thrombophilia, and bone marrow dysfunction.[A263501,L50417] Both hemolysis and thrombophilia are mediated primarily by the complement system.[A263501]…

Eculizumab is a monoclonal antibody that targets complement protein C5.[L6919,A2245] Binding to this protein prevents the activation of a complement terminal complex, which is used to treat a number of autoimmune conditions.[L6919,A2245,A2246] Eculizumab w…

Nomacopan is under investigation in clinical trial NCT03427060 (Coversin in PNH in Patients With Resistance to Eculizumab Due to Complement C5 Polymorphisms).

Pegcetacoplan is a complement inhibitor indicated in the treatment of paroxysmal nocturnal hemoglobinuria (PNH).[A235000,L34095] Prior to its FDA approval, patients with PNH were typically treated with the C5 inhibiting monoclonal antibody [eculizumab].[A2350…

Ravulizumab is a potent and selective complement 5 (C5) inhibitor. It is a humanized monoclonal IgG2/4 kappa antibody produced in Chinese hamster ovary (CHO) cells.[L39690] Ravulizumab was engineered from [eculizumab], another complement inhibitor, to increas…

Satralizumab is a recombinant humanized monoclonal antibody targeted against human interleukin-6 (IL-6) receptors, similar to [tocilizumab], which is produced in Chinese hamster ovary cells and based on an IgG2 framework.[L15536] Satralizumab is used in the t…

Cold agglutinin disease (CAD) is a type of autoimmune hemolytic anemia (AIHA) in which autoantibodies directed against red blood cell surface antigens cause hemolysis at low (3-4°C) temperatures.[A245154,L40114] This cold subtype accounts for approximately 15…