High-dose etanercept in ankylosing spondylitis: results of a 12-week randomized, double blind, controlled multicentre study (LOADET study).
Author(s): Navarro-Sarabia F, Fernandez-Sueiro JL, Torre-Alonso JC, Gratacos J, Queiro R, Gonzalez C, Loza E, Linares L, Zarco P, Juanola X, Roman-Ivorra J, Martin-Mola E, Sanmarti R, Mulero J, Diaz G, Armendariz Y, Collantes E
Affiliation(s): Rheumatology Department, Hospital Universitario Virgen Macarena, Avenida Dr Fedriani 3, 41009 Sevilla, Spain. firstname.lastname@example.org
Publication date & source: 2011-10, Rheumatology (Oxford)., 50(10):1828-37. Epub 2011 Jun 23.
Publication type: Multicenter Study; Randomized Controlled Trial; Research Support, Non-U.S. Gov't
OBJECTIVES: Etanercept 50 mg a week is approved in the treatment of AS. Increasing the etanercept dose to 100 mg/week improves efficacy in cutaneous psoriasis, a clinical manifestation related to the spondylarthritis family, while maintaining its safety profile. The purpose of this study was to evaluate the efficacy and safety of etanercept 100 vs 50 mg/week in patients with AS. METHODS: Adult patients with AS were randomized to receive etanercept 50 mg twice a week (biw), or etanercept 50 mg once a week (qw) for 12 weeks. The primary efficacy endpoint was Ankylosing Spondylitis Assessment Study (ASAS20) response at Week 12; secondary endpoints included ASAS40, ASAS50, ASAS70 and ASAS5/6 responses, partial remission and quality of life. Safety was assessed until 15 days after the last visit. RESULTS: A total of 108 patients were randomly selected and treated, 54 in each arm. At 12 weeks, ASAS20 response was achieved by 34 (71%) out of 48 patients of the etanercept 50 mg biw group and by 37 (76%) out of 49 patients of the etanercept 50 mg qw group (not statistically significant differences). Other efficacy variables improved significantly over time, but not between treatment groups. Fifty-six patients experienced at least one adverse event (generally, infections and infestations, gastrointestinal disorders and injection site reactions), most of them mild or moderate. CONCLUSIONS: High-dose (100 mg/week) etanercept in the treatment of AS for 12 weeks is as safe as the standard dose (50 mg/week). However, it does not significantly increase its efficacy. Trial Registration. Clinicaltrials.gov, http://clinicaltrials.gov/, NCT00873730.