OBJECTIVE:Infliximab monotherapy provided a rapid and high degree of clinical benefit in patients with moderate to severe psoriasis in a previously conducted trial. Herein we describe the pharmacodynamic and pharmacokinetic results observed in this clinical trial. METHODS:Patients with psoriasis received 5 or 10 mg/kg of infliximab or placebo at weeks 0, 2, and 6. Immunohistochemical analysis of lesional (weeks 0, 2, 10) and nonlesional (week 0) biopsies was conducted. Median infliximab half-life and peak serum concentrations over time were calculated. RESULTS:Infliximab immunotherapy resulted in rapid and dramatic decreases in epidermal inflammation and normalization of keratinocyte differentiation in psoriatic plaques; these changes preceded maximal clinical response. Infliximab concentrations were maintained above the detection limit (0.1 mg/mL) in the majority of patients through week 14. CONCLUSION: The clinical and immunohistologic data demonstrate a pivotal role for tumor necrosis factor-alpha in the pathogenesis of psoriasis and support further development of drugs targeting tumor necrosis factor-alpha.
RCT Entities:
OBJECTIVE:Infliximab monotherapy provided a rapid and high degree of clinical benefit in patients with moderate to severe psoriasis in a previously conducted trial. Herein we describe the pharmacodynamic and pharmacokinetic results observed in this clinical trial. METHODS:Patients with psoriasis received 5 or 10 mg/kg of infliximab or placebo at weeks 0, 2, and 6. Immunohistochemical analysis of lesional (weeks 0, 2, 10) and nonlesional (week 0) biopsies was conducted. Median infliximab half-life and peak serum concentrations over time were calculated. RESULTS:Infliximab immunotherapy resulted in rapid and dramatic decreases in epidermal inflammation and normalization of keratinocyte differentiation in psoriatic plaques; these changes preceded maximal clinical response. Infliximab concentrations were maintained above the detection limit (0.1 mg/mL) in the majority of patients through week 14. CONCLUSION: The clinical and immunohistologic data demonstrate a pivotal role for tumor necrosis factor-alpha in the pathogenesis of psoriasis and support further development of drugs targeting tumor necrosis factor-alpha.
Authors: A Y Goedkoop; M C Kraan; M B M Teunissen; D I Picavet; M A de Rie; J D Bos; P P Tak Journal: Ann Rheum Dis Date: 2004-07 Impact factor: 19.103