Frequency and prognostic impact of antibodies to aquaporin-4 in patients with optic neuritis

Sven Jarius, Jette Frederikson, Patrick Waters, Friedemann Paul, Gulsen Akman-Demir, Romain Marignier, Diego Franciotta, Klemens Ruprecht, Bettina Kuenz, Paulus Rommer, Wolfgang Kristoferitsch, Brigitte Wildemann, Angela Vincent

Research output: Contribution to journalArticlepeer-review

Abstract

Background: Antibodies to aquaporin-4 (AQP4-Ab) are found in 60-80% of patients with neuromyelitis optica (NMO), a severely disabling inflammatory CNS disorder of putative autoimmune aetiology, which predominantly affects the optic nerves and spinal cord. Objective: To assess the frequency of AQP4-Ab in patients with optic neuritis (ON), and to investigate the prognostic implications of AQP4-Ab seropositivity in such patients. Patients and methods: AQP4-Ab serum levels were determined in 224 individuals from Austria, Denmark, France, Germany, Italy, and Turkey using a newly developed fluorescence immunoprecipitation assay employing recombinant human AQP4. Results: AQP4-Ab were detectable in 8/139 (5.8%) patients with acute monosymptomatic optic neuritis (AMON) and in 10/17 (58.8%) patients with established NMO and a last relapse of acute ON (NMO/ON), but not in 32 patients with multiple sclerosis or in 36 healthy controls. At last examination, 4/8 (50%) seropositive AMON patients had met the criteria for NMO but 0/128 seronegative AMON patients. Disease severity differed significantly between seropositive and seronegative AMON. Complete bilateral or unilateral blindness occurred in six AQP4-Ab positive patients, but only in one AQP4-Ab negative patient. AQP4-Ab levels did not vary between seropositive AMON and NMO/ON and did not correlate with disease severity. Female gender, a relapsing course, and concomitant autoimmunity were associated with AQP4-Ab seropositive status and risk of developing NMO. Conclusion: AQP4-Ab is relatively rare among patients with AMON, but if present it predicts a high rate of conversion to NMO within one year.

Original languageEnglish
Pages (from-to)158-162
Number of pages5
JournalJournal of the Neurological Sciences
Volume298
Issue number1-2
DOIs
Publication statusPublished - Nov 15 2010

Keywords

  • Antibodies to aquaporin-4
  • Devic disease
  • Devic's disease
  • Longitudinally extensive transverse myelitis
  • Multiple sclerosis
  • Neuromyelitis optica (NMO)
  • NMO-IgG
  • Optic neuritis

ASJC Scopus subject areas

  • Clinical Neurology
  • Neurology

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