title: Rituximab as rescue therapy in anti-neutrophil cytoplasmic antibody-associated vasculitis: a single-centre experience with 15 patients.
abstract: BACKGROUND
  B-cell depletion with rituximab, a chimeric anti-CD20 antibody, is a novel treatment for refractory and relapsing ANCA-associated small-vessel vasculitis. Data are limited and most reports describe single patients or small numbers of patients followed prospectively.
  
  
  METHODS
  We report a single-centre experience with 15 patients who received rituximab for refractory or relapsing ANCA-associated vasculitis. All patients had been treated with corticosteroids and cyclophosphamide and a variety of other second-line immunosuppressive agents. None of the patients had evidence of infection and received four infusions of 375 mg/m(2) of rituximab. Disease activity was assessed in accordance with the Birmingham Vasculitis Activity Score (BVAS). BVAS, C-reactive protein and ANCA titres were recorded at baseline and during follow-up.
  
  
  RESULTS
  B-cell depletion was achieved in all patients. Partial or complete remission was seen in 14 of 15 patients with a significant decline in BVAS compared to baseline (P < 0.007). One patient with granulomatous ANCA-associated vasculitis did not respond to rituximab. There were no side effects during rituximab infusion. Transient leucopenia was observed in two patients. One patient with bronchial stenosis died of pneumonia 5.5 months after the initiation of rituximab treatment. One initially anti-HBc-positive/HBsAg-negative patient experienced a reactivation of hepatitis B, developed end-stage renal failure and died after refusal of dialysis.
  
  
  CONCLUSIONS
  We report the largest case series of rituximab use for ANCA-associated vasculitis so far. Our data support that the drug is capable of inducing partial or complete remission in refractory or relapsing patients. Leucopenia and infectious complications remain a matter of concern.
authors.affiliation: Department of Nephrology, Hannover Medical School, Hannover, Germany.
authors.forename: Svjetlana
authors.initials: S
authors.lastname: Lovric
authors.forename: Uta
authors.initials: U
authors.lastname: Erdbruegger
authors.forename: Philipp
authors.initials: P
authors.lastname: Kümpers
authors.forename: Alexander
authors.initials: A
authors.lastname: Woywodt
authors.forename: Christian
authors.initials: C
authors.lastname: Koenecke
authors.forename: Heiner
authors.initials: H
authors.lastname: Wedemeyer
authors.forename: Hermann
authors.initials: H
authors.lastname: Haller
authors.forename: Marion
authors.initials: M
authors.lastname: Haubitz
mesh_terms: D000328:Adult; D000368:Aged; D019268:Antibodies, Antineutrophil Cytoplasmic / Q000097:blood*; D000911:Antibodies, Monoclonal / Q000627:therapeutic use*; D058846:Antibodies, Monoclonal, Murine-Derived; D001402:B-Lymphocytes / Q000276:immunology*; D005260:Female; D006801:Humans; D008212:Lymphocyte Depletion / Q000379:methods*; D008297:Male; D008875:Middle Aged; D012008:Recurrence; D000069283:Rituximab; D014657:Vasculitis / Q000276:immunology* / Q000473:pathology / Q000628:therapy*; D055815:Young Adult
chemical_list: D019268:Antibodies, Antineutrophil Cytoplasmic; D000911:Antibodies, Monoclonal; D058846:Antibodies, Monoclonal, Murine-Derived; D000069283:Rituximab