Diagnostic value of aquaporin-4-IgG live cell based assay in neuromyelitis optica spectrum disorders
MULTIPLE SCLEROSIS JOURNAL-EXPERIMENTAL TRANSLATIONAL AND CLINICAL(2021)
摘要
Objective Determine the utility of aquaporin 4 IgG (AQP4-IgG) testing (live cell-based assay) for Neuromyelitis Optica Spectrum Disorders (NMOSD). Methods We included Mayo Clinic patients (1/1/2018-12/31/2019) tested for serum AQP4-IgG by live cell-based flow-cytometric assay. Medical records were reviewed to assess if patients fulfilled 2015 NMOSD criteria. Results Of 1371 patients tested, 41 were positive (3%) and all fulfilled NMOSD criteria with AQP4-IgG (specificity = 100%). Only 10/1330 testing negative met NMOSD criteria without AQP4-IgG (sensitivity = 80%) and seven of these 10 were MOG-IgG positive. Conclusions AQP4-IgG by live cell-based assay was highly specific and without false positives in a high throughput setting.
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