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Association of serum markers with improvement in clinical response measures after treatment with golimumab in patients with active rheumatoid arthritis despite receiving methotrexate: results from the GO-FORWARD study.

Author(s): Visvanathan S, Rahman MU, Keystone E, Genovese M, Klareskog L, Hsia E, Mack M, Buchanan J, Elashoff M, Wagner C

Affiliation(s): Centocor Research and Development, Inc, 200 Great Valley Parkway, Malvern, PA 19355, USA.

Publication date & source: 2010, Arthritis Res Ther., 12(6):R211. Epub 2010 Nov 17.

Publication type: Randomized Controlled Trial; Research Support, Non-U.S. Gov't

INTRODUCTION: The goal of this study was to identify serum markers that are modulated by treatment with golimumab with or without methotrexate (MTX) and are associated with clinical response. METHODS: Sera were collected at weeks 0 and 4 from a total of 336 patients (training dataset, n = 100; test dataset, n = 236) from the GO-FORWARD study of patients with active rheumatoid arthritis despite MTX. Patients were randomly assigned to receive placebo plus MTX; golimumab, 100 mg plus placebo; golimumab, 50 mg plus MTX; or golimumab, 100 mg plus MTX. Subcutaneous injections were administered every 4 weeks. Samples were tested for select inflammatory, bone, and cartilage markers and for protein profiling using multianalyte profiles. RESULTS: Treatment with golimumab with or without MTX resulted in significant decreases in a variety of serum proteins at week 4 as compared with placebo plus MTX. The American College of Rheumatology (ACR) 20, ACR 50, and Disease Activity Score (DAS) 28 responders showed a distinct biomarker profile compared with nonresponding patients. CONCLUSIONS: ACR 20 and ACR 50 responders among the golimumab/golimumab + MTX-treated patients had a distinct change from baseline to week 4 in serum protein profile as compared with nonresponders. Some of these changed markers were also associated with multiple clinical response measures and improvement in outcome measures in golimumab/golimumab + MTX-treated patients. Although the positive and negative predictive values of the panel of markers were modest, they were stronger than C-reactive protein alone in predicting clinical response to golimumab. TRIAL REGISTRATION: http://ClinicalTrials.gov identification number: NCT00264550.

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