NCIt definition : A synthetic macrocyclic peptide inhibitor of the terminal complement protein C5, with
potential anti-inflammatory and cell protective activities. Upon subcutaneous administration,
complement zilucoplan binds to a unique site in terminal complement protein C5, which
blocks C5 cleavage into C5a and C5b and prevents the C5b-dependent assembly of the
membrane-attack complex (MAC). Zilucoplan also inhibits the interaction between C5b
and C6, thereby further blocking MAC assembly. This prevents MAC-mediated lysis and
destruction of red blood cells (RBCs) that occurs in complement-mediated diseases,
such as paroxysmal nocturnal hemoglobinuria (PNH), generalized myasthenia gravis (gMG)
and lupus nephritis (LN). C5, a complement pathway protein, is expressed at high levels
by the liver.;