α-Synuclein RT-QuIC assay in cerebrospinal fluid of patients with dementia with Lewy bodies

Matilde Bongianni, Anna Ladogana, Stefano Capaldi, Sigrid Klotz, Simone Baiardi, Annachiara Cagnin, Daniela Perra, Michele Fiorini, Anna Poleggi, Giuseppe Legname, Tatiana Cattaruzza, Francesco Janes, Massimo Tabaton, Bernardino Ghetti, Salvatore Monaco, Gabor G. Kovacs, Piero Parchi, Maurizio Pocchiari, Gianluigi Zanusso

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Abstract

We applied RT-QuIC assay to detect α-synuclein aggregates in cerebrospinal fluid (CSF) of patients with suspected Creutzfeldt–Jakob disease who had a neuropathological diagnosis of dementia with Lewy bodies (DLB) (n = 7), other neurodegenerative diseases with α-synuclein mixed pathology (n = 20), or without Lewy-related pathology (n = 49). The test had a sensitivity of 92.9% and specificity of 95.9% in distinguishing α-synucleinopathies from non-α-synucleinopathies. When performed in the CSF of patients with DLB (n = 36), RT-QuIC was positive in 17/20 with probable DLB, 0/6 with possible DLB, and 0/10 with Alzheimer disease. These results indicate that RT-QuIC for α-synuclein is an accurate test for DLB diagnosis.

Original languageEnglish (US)
Pages (from-to)2120-2126
Number of pages7
JournalAnnals of Clinical and Translational Neurology
Volume6
Issue number10
DOIs
StatePublished - Oct 1 2019

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ASJC Scopus subject areas

  • Neuroscience(all)
  • Clinical Neurology

Cite this

Bongianni, M., Ladogana, A., Capaldi, S., Klotz, S., Baiardi, S., Cagnin, A., Perra, D., Fiorini, M., Poleggi, A., Legname, G., Cattaruzza, T., Janes, F., Tabaton, M., Ghetti, B., Monaco, S., Kovacs, G. G., Parchi, P., Pocchiari, M., & Zanusso, G. (2019). α-Synuclein RT-QuIC assay in cerebrospinal fluid of patients with dementia with Lewy bodies. Annals of Clinical and Translational Neurology, 6(10), 2120-2126. https://doi.org/10.1002/acn3.50897