Pegloticase immunogenicity: the relationship between efficacy and antibody development in patients treated for refractory chronic gout.

ABSTRACT:

Introduction

The efficacy of pegloticase, a polyethylene glycol (PEG)-conjugated mammalian recombinant uricase, approved for chronic refractory gout, can be limited by the development of antibodies (Ab). Analyses from 2 replicate, 6-month, randomized controlled trials were performed to characterize Ab responses to pegloticase.

Methods

Anti-pegloticase, anti-PEG, and anti-uricase Ab were determined by validated enzyme-linked immunosorbent assays. Ab titers were analyzed for possible relationships with serum pegloticase concentrations, serum uric acid (sUA) lowering, and risk of infusion reactions (IRs).

Results

Sixty-nine (41%) of 169 patients receiving pegloticase developed high titer anti-pegloticase Ab (> 1:2430) and 40% (67/169) developed anti-PEG Ab; 1 patient rec

SUBMITTER: Lipsky PE 

PROVIDER: S-EPMC4060440 | biostudies-literature | 2014 Mar

REPOSITORIES: biostudies-literature