Summary
IL-18 binding protein (BP) neutralizes the activity of IL-18, a cytokine implicated in psoriasis and rheumatoid arthritis (RA). We investigated the pharmacokinetics, pharmacodynamics and safety of recombinant human IL-18 BP (r-hIL-18 BP) in healthy volunteers and subjects with psoriasis or RA in four phase I studies.
A) Healthy volunteers (n=24) were randomised to receive a single subcutaneous (sc) injection of r-hIL-18 BP (20,70,210 or 350 mg) or placebo. B) Healthy volunteers (n=10) were randomised to receive six sc injections of r-hIL-18 BP (35 or 175 mg, 48 h between injections) or placebo. C) Subjects with moderate-to-severe plaque psoriasis (n=35) were randomised to receive r-hIL-18 BP (20,160 or 320 mg, sc tiw) or placebo for 6 weeks. D) Subjects with active, moderate-to-severe RA (n=36) were randomised to receive r-hIL-18 BP (20,80,160 mg, sc tiw) or placebo for 6 weeks. Pharmacokinetics, pharmacodynamics and safety were assessed in all four studies.
r-hIL-18 BP showed a dose-dependent pharmacokinetic profile, with a peak serum concentration of 6–48 hours. With repeated sc injections tiw, a steady state was achieved in 1–2 weeks among subjects with psoriasis or RA. The majority of adverse events were mild or moderate in severity. Injection site reactions were the most frequently reported event in subjects with psoriasis or RA. r-hIL-18 BP displays dose-dependent pharmacokinetics, has a favourable safety profile and is well-tolerated in healthy volunteers and in subjects with moderate-to-severe plaque psoriasis or active, moderate-to-severe RA.
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IL-18 BP Study GroupCanada: Professor Robert Bissonnette, Professor Kim Papp, Professor Neil Shear; Croatia: Professor Bozidar Curkovic;Germany: Professor Wolfram Sterry;Serbia and Montenegro: Professor Aleksandar Dimic, Professor Vladimir Mircetic;Slovak Republic: Dr Zlata Kmecova, Professor Josef Ravensky;Slovenia: Professor Blaz Rozman;The Netherlands: Professor Paul Tak;UK: Dr Iain Mclnnes, Dr Anthony Priestley, Dr Amran Saifulanwar, Dr Rene Van der Merwe.
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Tak, P.P., Bacchi, M. & Bertolino, M. Pharmacokinetics of IL-18 binding protein in healthy volunteers and subjects with rheumatoid arthritis or plaque psoriasis. European Journal of Drug Metabolism and Pharmacokinetics 31, 109–116 (2006). https://doi.org/10.1007/BF03191127
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DOI: https://doi.org/10.1007/BF03191127