title: Lack of efficacy of a third tumour necrosis factor alpha antagonist after failure of a soluble receptor and a monoclonal antibody.
abstract: OBJECTIVE
  Some studies have highlighted the potential benefits of switching from infliximab to etanercept, or after failure of one or the other treatment. To our knowledge, no study has assessed the potential benefits of using the three anti-TNF-alpha agents that are currently available. The objective of this retrospective study was to assess the response to treatment in RA patients who had received the three anti-TNF-alpha agents, namely infliximab, etanercept and adalimumab.
  
  
  METHODS
  Among a cohort of 364 patients undergoing biological treatments since the year 2000, 284 had been treated with only one anti-TNF-alpha agent. Our assessment focused on the records of 70 patients who had received at least two anti-TNF-alpha agents. Twenty of the 70 patients had received all three anti-TNF-alpha agents (infliximab, etanercept and adalimumab). Effectiveness was assessed using the 28-joint Disease Activity Score (DAS28), and adverse events were reported for each anti-TNF-alpha treatment.
  
  
  RESULTS
  Of the 70 patients who had received two anti-TNF-alpha agents, 32 had switched from an antibody to a soluble receptor; 45% of them had a good clinical response to the soluble receptor. Thirty patients had switched from a soluble receptor to an antibody; 45% of them had a good clinical response to the antibody. Only eight patients had switched from an antibody to another antibody with an efficiency score of 33%. Of the 20 patients who had received three anti-TNF-alpha agents, seven had stopped receiving the third anti-TNF-alpha agent due to lack of effectiveness. In this group of non-responders to the third anti-TNF-alpha treatment, all patients except one had stopped receiving the two previous anti-TNF-alpha agents, without adverse events, for lack of effectiveness. These patients were deemed resistant to anti-TNF-alpha therapy.
  
  
  CONCLUSIONS
  Resistance to anti-TNF-alpha agents is rare. The lack of effectiveness of a soluble receptor and of one of the anti-TNF-alpha antibodies predicts the lack of effectiveness of the third anti-TNF-alpha treatment.
authors.affiliation: Service de Rhumatologie, Centre Hospitalier Régional et Universitaire de Lille, 59037 Lille cedex, France. e-solau@chru-lille.fr
authors.forename: E
authors.initials: E
authors.lastname: Solau-Gervais
authors.forename: N
authors.initials: N
authors.lastname: Laxenaire
authors.forename: B
authors.initials: B
authors.lastname: Cortet
authors.forename: S
authors.initials: S
authors.lastname: Dubucquoi
authors.forename: B
authors.initials: B
authors.lastname: Duquesnoy
authors.forename: R-M
authors.initials: RM
authors.lastname: Flipo
mesh_terms: D000068879:Adalimumab; D000911:Antibodies, Monoclonal / Q000008:administration & dosage / Q000627:therapeutic use; D061067:Antibodies, Monoclonal, Humanized; D001172:Arthritis, Rheumatoid / Q000188:drug therapy*; D004334:Drug Administration Schedule; D004359:Drug Therapy, Combination; D000068800:Etanercept; D005260:Female; D006801:Humans; D007074:Immunoglobulin G / Q000008:administration & dosage / Q000627:therapeutic use; D007155:Immunologic Factors / Q000008:administration & dosage* / Q000627:therapeutic use; D000069285:Infliximab; D008297:Male; D008875:Middle Aged; D018124:Receptors, Tumor Necrosis Factor / Q000008:administration & dosage / Q000627:therapeutic use; D012189:Retrospective Studies; D018709:Statistics, Nonparametric; D017211:Treatment Failure; D014409:Tumor Necrosis Factor-alpha / Q000037:antagonists & inhibitors*
chemical_list: D000911:Antibodies, Monoclonal; D061067:Antibodies, Monoclonal, Humanized; D007074:Immunoglobulin G; D007155:Immunologic Factors; D018124:Receptors, Tumor Necrosis Factor; D014409:Tumor Necrosis Factor-alpha; D000069285:Infliximab; D000068879:Adalimumab; D000068800:Etanercept