A highly specific and sensitive nanoimmunosensor for the diagnosis of neuromyelitis optica spectrum disorders.

ABSTRACT: A precise diagnosis for neuromyelitis optica spectrum disorders (NMOSD) is crucial to improve patients' prognostic, which requires highly specific and sensitive tests. The cell-based assay with a sensitivity of 76% and specificity of 100% is the most recommended test to detect anti-aquaporin-4 antibodies (AQP4-Ab). Here, we tested four AQP4 external loop peptides (AQP4_61-70, AQP4_131-140, AQP4_141-150, and AQP4_201-210) with an atomic force microscopy nanoimmunosensor to develop a diagnostic assay. We obtained the highest reactivity with AQP4_61-70-nanoimunosensor. This assay was effective in detecting AQP4-Ab in sera of NMOSD patients with 100% specificity (95% CI 63.06-100), determined by the cut-off adhesion force value of 241.3 pN. NMO

SUBMITTER: de Souza Moraes A 

PROVIDER: S-EPMC6834626 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature