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  • Title: Population Pharmacokinetics and Immunogenicity of Adalimumab in Adult Patients with Moderate-to-Severe Hidradenitis Suppurativa.
    Author: Nader A, Beck D, Noertersheuser P, Williams D, Mostafa N.
    Journal: Clin Pharmacokinet; 2017 Sep; 56(9):1091-1102. PubMed ID: 28066879.
    Abstract:
    INTRODUCTION: Hidradenitis suppurativa (HS) is a serious, debilitating, chronic inflammatory skin disease. Adalimumab is a fully human, immunoglobulin G1 monoclonal antibody specific for tumor necrosis factor-alpha recently approved for use in patients with HS. The aim of this study is to describe the population pharmacokinetics and immunogenicity of adalimumab in adult patients with HS. METHODS: Data from one phase II and two phase III studies were included in the analysis. Serial serum adalimumab concentrations and anti-adalimumab antibody (AAA) development status were used to develop the population pharmacokinetic model. The population pharmacokinetic analysis involved evaluating the effects of potential covariates on adalimumab pharmacokinetics. RESULTS: Mean serum adalimumab concentrations after 40-mg weekly dosing reached steady state (10-12 µg/mL in the phase II study and 7 µg/mL in the phase III studies) by week 2 and were maintained through week 12. The percentage of patients testing positive for AAA was low (10% in the phase II study and 7% in the phase III studies). Adalimumab pharmacokinetics was described by a one-compartment model with first-order absorption. Significant covariates for clearance included the presence of AAA, baseline C-reactive protein, and baseline body weight. CONCLUSIONS: Adalimumab pharmacokinetics in HS patients was described using a one-compartment model with weight, baseline C-reactive protein, and AAA affecting adalimumab exposure. AAA development results in decreased adalimumab concentrations with a potential decrease in efficacy. Serum adalimumab concentrations in HS patients receiving 40-mg weekly dosing were similar to those observed in other indications under approved dosing regimens.
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