Comparative clinical efficacy and safety of biosimilar ABP 959 and eculizumab reference product in patients with paroxysmal nocturnal hemoglobinuria.

ABP 959 is a biosimilar to the eculizumab reference product (RP), which is approved for the treatment of patients with paroxysmal nocturnal hemoglobinuria (PNH). This multicenter, randomized, double-blind, active-controlled, two-period crossover study randomized eculizumab RP-treated patients with PNH to one of two treatment sequences (ABP 959/eculizumab RP or eculizumab RP/ABP 959) to evaluate the clinical similarity of ABP 959 when compared with eculizumab RP. This study evaluated the efficacy of ABP 959 when compared with eculizumab RP based on control of intravascular hemolysis as measured by lactate dehydrogenase (LDH) and by the time-adjusted area under the effect curve of LDH.

Immune Complex Formation Is Associated With Loss of Tolerance and an Antibody Response to Both Drug and Target.

AMG 966 is a bi-specific, heteroimmunoglobulin molecule that binds both tumor necrosis factor alpha (TNFα) and TNF-like ligand 1A (TL1A). In a first-in-human clinical study in healthy volunteers, AMG 966 elicited anti-drug antibodies (ADA) in 53 of 54 subjects (98.1%), despite a paucity of T cell epitopes observed in T cell assays.