Recurrences and infections during continuous immunosuppressive therapy after beginning dialysis in ANCA-associated vasculitis.
BACKGROUND
Approximately 20% of patients with antineutrophil cytoplasm antibody-associated systemic vasculitis (AASV) develop end-stage renal failure (ESRF). It is not clear whether continuation of immunosuppression, with its associated risks, is beneficial because relapse rates after the development of ESRF are reported to be low.


METHODS
Case series.


METHODS
Single tertiary-care referral center. 46 patients with AASV who developed ESRF from 1971 to 2004.


METHODS
Treatment, relapse rates before and after dialysis therapy, patient outcome after dialysis therapy, and infection (defined as admission to hospital or intravenous antibiotics) were recorded.


RESULTS
Patients with AASV on dialysis therapy had 1- and 5-year survival rates of 82% and 55%, equivalent to current 1- and 5-year survival rates of dialysis patients reported by the UK renal registry, respectively. Infection rates in patients with ESRF were high in those with AASV on dialysis therapy; 106 events in 35 patients (dialysis patients with AASV, 0.89 infections/patient-year; confidence interval [CI], 0.74 to 1.08). Eight of 9 patients who died of infection were receiving immunosuppressive therapy. No patient died of active disease. Relapse rates after dialysis commencement were less than those predialysis (6 relapses in 4 patients; 0.05 relapses/patient-year postdialysis; CI, 0.02 to 0.1 compared with 18 relapses in 11 patients; 0.13 relapses/patient-year predialysis; CI, 0.07 to 0.19).


CONCLUSIONS
This is a retrospective study spread over 3 decades with no control group.


CONCLUSIONS
Patients with AASV and ESRF are less likely to experience relapse than before dialysis therapy. Patients with AASV on dialysis therapy have a high rate of infection. These results may not be applicable to patients with pulmonary involvement.
Weidanz
Frauke
F
Division of Immunity and Infection, University of Birmingham, Edgbaston, Birmingham, UK.
Day
Clara J
CJ
Hewins
Peter
P
Savage
Caroline O
CO
Harper
Lorraine
L
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019268:Antibodies, Antineutrophil Cytoplasmic / Q000097:blood*; D015267:Churg-Strauss Syndrome / Q000188:drug therapy; D005260:Female; D014890:Granulomatosis with Polyangiitis / Q000188:drug therapy; D006801:Humans; D007166:Immunosuppressive Agents / Q000627:therapeutic use*; D007239:Infections / Q000453:epidemiology*; D053208:Kaplan-Meier Estimate; D007676:Kidney Failure, Chronic / Q000209:etiology / Q000628:therapy*; D008297:Male; D008875:Middle Aged; D012008:Recurrence; D006435:Renal Dialysis; D012189:Retrospective Studies; D015996:Survival Rate; D014657:Vasculitis / Q000150:complications / Q000188:drug therapy* / Q000401:mortality
D019268:Antibodies, Antineutrophil Cytoplasmic; D007166:Immunosuppressive Agents