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Interlaboratory Validation of Cerebrospinal Fluid Α-synuclein Quantification in the Diagnosis of Sporadic Creutzfeldt-jakob Disease

Kruse, N; Heslegrave, A; Gupta, V; Foiani, M; Villar-Piqué, A; Schmitz, M; Lehmann, S; ... Llorens, F; + view all (2018) Interlaboratory Validation of Cerebrospinal Fluid Α-synuclein Quantification in the Diagnosis of Sporadic Creutzfeldt-jakob Disease. Alzheimer's and Dementia: Diagnosis, Assessment and Disease Monitoring , 10 pp. 461-470. 10.1016/j.dadm.2018.06.005. Green open access

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Abstract

INTRODUCTION: Cerebrospinal fluid α-synuclein level is increased in sporadic Creutzfeldt-Jakob disease cases. However, the clinical value of this biomarker remains to be established. In this study, we have addressed the clinical validation parameters and the interlaboratory reproducibility by using an electrochemiluminescent assay. METHODS Cerebrospinal fluid α-synuclein was quantified in a total of 188 sporadic Creutzfeldt-Jakob disease and non–Creutzfeldt-Jakob-disease cases to determine sensitivity and specificity values and lot-to-lot variability. Two round robin tests with 70 additional cases were performed in six independent laboratories. RESULTS: A sensitivity of 93% and a specificity of 96% were achieved in discriminating sporadic Creutzfeldt-Jakob disease. No differences were detected between lots. The mean interlaboratory coefficient of variation was 23%, and the intralaboratory coefficient of variations ranged 2.70%–11.39%. Overall, 97% of samples were correctly diagnosed. DISCUSSION: The herein validated α-synuclein assay is robust, accurate, and reproducible in identifying Creutzfeldt-Jakob disease cases. Thus, it is ready for implementation in the clinical practice to support the diagnosis of Creutzfeldt-Jakob disease.

Type: Article
Title: Interlaboratory Validation of Cerebrospinal Fluid Α-synuclein Quantification in the Diagnosis of Sporadic Creutzfeldt-jakob Disease
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.dadm.2018.06.005
Publisher version: https://doi.org/10.1016/j.dadm.2018.06.005
Language: English
Additional information: This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
Keywords: Sporadic Creutzfeldt-Jakob disease, α-Synuclein, Cerebrospinal fluid, Biomarker, Diagnostic accuracy, Interlaboratory reproducibility, Round robin test
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology > Neurodegenerative Diseases
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology > UK Dementia Research Institute
URI: https://discovery.ucl.ac.uk/id/eprint/10058278
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