title: Intravenous hydrocortisone premedication reduces antibodies to infliximab in Crohn's disease: a randomized controlled trial.
abstract: OBJECTIVE
  We assessed the relationship between antibodies to infliximab (ATI) and the loss of response postinfliximab, infusion reactions and, in a randomized trial, investigated whether intravenous hydrocortisone premedication can reduce ATI.
  
  
  METHODS
  Initially, we prospectively evaluated clinical response, adverse events, and ATI levels in 53 consecutive patients with Crohn's disease who received 199 infliximab (5 mg/kg) infusions. Subsequently, 80 patients with Crohn's disease were randomized to intravenous hydrocortisone 200 mg or placebo immediately before their first and subsequent infliximab infusions. The primary endpoint was reduction in median ATI levels at week 16. Analysis was by intention to treat.
  
  
  RESULTS
  Nineteen of our initial 53 patients (36%) developed ATI, including all 7 patients with serious infusion reactions (median ATI level, 19.6 microg/mL). Eleven of 15 patients (73%) who lost their initial response were ATI positive compared with none of 21 continuous responders, (8.9 vs. 0.7 microg/mL, P < 0.0001). Administering a second infusion within 8 weeks of the first (OR, 0.13; 95% CI, 0.03-0.5; P = 0.0007) or concurrent immunosuppressants (OR, 0.19; 95% CI, 0.04-1.03; P = 0.007) significantly reduced ATI formation. In the placebo-controlled trial, ATI levels were lower at week 16 among hydrocortisone-treated patients (1.6 vs. 3.4 microg/mL, P = 0.02), and 26% of hydrocortisone-treated patients developed ATI compared with 42% of placebo-treated patients, P = 0.06.
  
  
  CONCLUSIONS
  Loss of initial response and infusion reactions post-infliximab is strongly related to ATI formation and level. Administering a second infusion within 8 weeks of the first and concurrent immunosuppressant therapy significantly reduce ATI formation. Intravenous hydrocortisone premedication significantly reduces ATI levels but does not eliminate ATI formation or infusion reactions.
authors.affiliation: Division of Gastroenterology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts 02215, USA. rfarrell@caregroup.harvard.edu
authors.forename: Richard J
authors.initials: RJ
authors.lastname: Farrell
authors.forename: Mazen
authors.initials: M
authors.lastname: Alsahli
authors.forename: Yoon-Tae
authors.initials: YT
authors.lastname: Jeen
authors.forename: Kenneth R
authors.initials: KR
authors.lastname: Falchuk
authors.forename: Mark A
authors.initials: MA
authors.lastname: Peppercorn
authors.forename: Pierre
authors.initials: P
authors.lastname: Michetti
mesh_terms: D000328:Adult; D000368:Aged; D000893:Anti-Inflammatory Agents / Q000008:administration & dosage* / Q000009:adverse effects; D000906:Antibodies / Q000097:blood; D000911:Antibodies, Monoclonal / Q000008:administration & dosage / Q000009:adverse effects / Q000276:immunology*; D003131:Combined Modality Therapy; D003424:Crohn Disease / Q000188:drug therapy* / Q000276:immunology; D005260:Female; D005765:Gastrointestinal Agents / Q000008:administration & dosage / Q000009:adverse effects / Q000276:immunology*; D006801:Humans; D006854:Hydrocortisone / Q000008:administration & dosage*; D000069285:Infliximab; D007275:Injections, Intravenous; D008297:Male; D008875:Middle Aged
chemical_list: D000893:Anti-Inflammatory Agents; D000906:Antibodies; D000911:Antibodies, Monoclonal; D005765:Gastrointestinal Agents; D000069285:Infliximab; D006854:Hydrocortisone