PMID- 21632677 OWN - NLM STAT- MEDLINE DCOM- 20120315 LR - 20151119 IS - 1499-2752 (Electronic) IS - 0315-162X (Linking) VI - 38 IP - 8 DP - 2011 Aug TI - Serum MMP-3 level as a biomarker for monitoring and predicting response to etanercept treatment in ankylosing spondylitis. PG - 1644-50 LID - 10.3899/jrheum.101128 [doi] AB - OBJECTIVE: To investigate whether level of serum matrix metalloproteinase-3 (MMP-3) can serve as a biomarker for monitoring and predicting response to etanercept treatment in patients with ankylosing spondylitis (AS) in daily clinical practice. METHODS: Ninety-two consecutive AS outpatients with active disease who started etanercept treatment were included in this longitudinal observational study. Clinical data were collected prospectively at baseline and after 3 and 12 months of treatment. At the same timepoints, serum MMP-3 levels were measured retrospectively by ELISA. RESULTS: Since baseline serum MMP-3 levels were significantly higher in male compared to female patients with AS, data analysis was split for gender. Changes in serum MMP-3 levels after etanercept treatment correlated positively with changes in clinical assessments of disease activity and physical function in both male and female patients. Receiver operating characteristic analysis in male patients showed that baseline serum MMP-3 levels had poor accuracy (AUC < 0.7) to discriminate between Assessments in Ankylosing Spondylitis 20 (ASAS20) or ASAS40 responders and nonresponders after 3 or 12 months of treatment. The accuracy of change in serum MMP-3 levels from baseline to 3 months in predicting response after 3 or 12 months of treatment was poor for ASAS40 (AUC < 0.7) or moderate for ASAS20 (AUC = 0.752 and 0.744, respectively), and was not superior to the accuracy of change in the currently used objective biomarkers, erythrocyte sedimentation rate and C-reactive protein. CONCLUSION: Although significant changes in serum MMP-3 levels were found after etanercept treatment, data analysis indicates that serum MMP-3 levels are not very useful for monitoring and predicting response to etanercept treatment in patients with AS in daily clinical practice. FAU - Arends, Suzanne AU - Arends S AD - Department of Rheumatology and Clinical Immunology, University Medical Center Groningen, University of Groningen, The Netherlands. S.Arends@reuma.umcg.nl FAU - van der Veer, Eveline AU - van der Veer E FAU - Groen, Henk AU - Groen H FAU - Houtman, Pieternella M AU - Houtman PM FAU - Jansen, Tim L T A AU - Jansen TL FAU - Leijsma, Martha K AU - Leijsma MK FAU - Bijzet, Johan AU - Bijzet J FAU - Limburg, Pieter C AU - Limburg PC FAU - Kallenberg, Cees G M AU - Kallenberg CG FAU - Spoorenberg, Anneke AU - Spoorenberg A FAU - Brouwer, Elisabeth AU - Brouwer E LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20110601 PL - Canada TA - J Rheumatol JT - The Journal of rheumatology JID - 7501984 RN - 0 (Antirheumatic Agents) RN - 0 (Biomarkers) RN - 0 (Immunoglobulin G) RN - 0 (Receptors, Tumor Necrosis Factor) RN - EC 3.4.24.17 (Matrix Metalloproteinase 3) RN - OP401G7OJC (Etanercept) SB - IM MH - Adult MH - Antirheumatic Agents/*therapeutic use MH - Biomarkers/*blood MH - Etanercept MH - Female MH - Humans MH - Immunoglobulin G/*therapeutic use MH - Longitudinal Studies MH - Male MH - Matrix Metalloproteinase 3/*blood MH - Middle Aged MH - Receptors, Tumor Necrosis Factor/*therapeutic use MH - Severity of Illness Index MH - Spondylitis, Ankylosing/*blood/*drug therapy/physiopathology MH - Treatment Outcome EDAT- 2011/06/03 06:00 MHDA- 2012/03/16 06:00 CRDT- 2011/06/03 06:00 PHST- 2011/06/03 06:00 [entrez] PHST- 2011/06/03 06:00 [pubmed] PHST- 2012/03/16 06:00 [medline] AID - jrheum.101128 [pii] AID - 10.3899/jrheum.101128 [doi] PST - ppublish SO - J Rheumatol. 2011 Aug;38(8):1644-50. doi: 10.3899/jrheum.101128. Epub 2011 Jun 1.