Cerebrospinal fluid ratio of phosphorylated tau protein and beta amyloid predicts amyloid PET positivity

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00159816%3A_____%2F20%3A00072969" target="_blank" >RIV/00159816:_____/20:00072969 - isvavai.cz</a>

Result on the web

<a href="https://www.csnn.eu/en/journals/czech-and-slovak-neurology-and-neurosurgery/2020-2-3/cerebrospinal-fluid-ratio-of-phosphorylated-tau-protein-and-beta-amyloid-predicts-amyloid-pet-positivity-121848?hl=cs" target="_blank" >https://www.csnn.eu/en/journals/czech-and-slovak-neurology-and-neurosurgery/2020-2-3/cerebrospinal-fluid-ratio-of-phosphorylated-tau-protein-and-beta-amyloid-predicts-amyloid-pet-positivity-121848?hl=cs</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.14735/amcsnn2020173" target="_blank" >10.14735/amcsnn2020173</a>

Result language

čeština

Original language name

Cerebrospinal fluid ratio of phosphorylated tau protein and beta amyloid predicts amyloid PET positivity

Original language description

Aim: Current diagnostic criteria for Alzheimer&apos;s dis ease shift the focus from clinical findings to metabolic biomarkers. Most widely used metabolic biomarkers in the Czech Republic are cerebrospinal fluid levels of beta amyloid 1-42, total tau, and phosphorylated tau 181, as well as amyloid PET. Our aim was to investigate the concordance of amyloid PET and cerebrospinal fluid biomarkers in clinical settings and propose a way of interpreting cerebrospinal fluid biomarker results in order to better predict the amyloid PET status in contradictory cases. Methods: A total of 103 patients underwent neuropsychological assessment, brain MRI, visually evaluated flutemetamol amyloid PET and examination of biomarkers in the cerebrospinal fluid. Concordance of amyloid PET and cerebrospinal fluid biomarkers was compared and subsequent optimal cut-off for the beta amyloid 1-42 and phosphorylated tau protein ratio was calculated. Results: Concordance between amyloid PET and beta amyloid 1-42 was 79%, followed by phosphorylated tau protein (72%). In 40% of cases, the results of cerebrospinal fluid biomarkers was contradictory. Beta amyloid 1-42 and phosphorylated tau protein ratio was found to best discriminate between amyloid PET positive and negative patients (AUC = 0.938, 95% CI = 0.890-0.986; P &lt; 0.001). Ratio of 9.47 provided 91.0% sensitivity and 91.3% specificity. Conclusion: Both methods show good diagnostic concordance. In case of contradictory cerebrospinal fluid biomarkers, we encourage using the beta amyloid 1-42 and phosphorylated tau protein ratio.

Czech name

Cerebrospinal fluid ratio of phosphorylated tau protein and beta amyloid predicts amyloid PET positivity

Czech description

Aim: Current diagnostic criteria for Alzheimer&apos;s dis ease shift the focus from clinical findings to metabolic biomarkers. Most widely used metabolic biomarkers in the Czech Republic are cerebrospinal fluid levels of beta amyloid 1-42, total tau, and phosphorylated tau 181, as well as amyloid PET. Our aim was to investigate the concordance of amyloid PET and cerebrospinal fluid biomarkers in clinical settings and propose a way of interpreting cerebrospinal fluid biomarker results in order to better predict the amyloid PET status in contradictory cases. Methods: A total of 103 patients underwent neuropsychological assessment, brain MRI, visually evaluated flutemetamol amyloid PET and examination of biomarkers in the cerebrospinal fluid. Concordance of amyloid PET and cerebrospinal fluid biomarkers was compared and subsequent optimal cut-off for the beta amyloid 1-42 and phosphorylated tau protein ratio was calculated. Results: Concordance between amyloid PET and beta amyloid 1-42 was 79%, followed by phosphorylated tau protein (72%). In 40% of cases, the results of cerebrospinal fluid biomarkers was contradictory. Beta amyloid 1-42 and phosphorylated tau protein ratio was found to best discriminate between amyloid PET positive and negative patients (AUC = 0.938, 95% CI = 0.890-0.986; P &lt; 0.001). Ratio of 9.47 provided 91.0% sensitivity and 91.3% specificity. Conclusion: Both methods show good diagnostic concordance. In case of contradictory cerebrospinal fluid biomarkers, we encourage using the beta amyloid 1-42 and phosphorylated tau protein ratio.

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

30103 - Neurosciences (including psychophysiology)

Project

<a href="/en/project/EF16_019%2F0000868" target="_blank" >EF16_019/0000868: Molecular, cellular and clinical approach to healthy ageing</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Česká a slovenská neurologie a neurochirurgie

ISSN

1210-7859

e-ISSN

—

Volume of the periodical

83

Issue of the periodical within the volume

2

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

7

Pages from-to

173-179

UT code for WoS article

000526056700009

EID of the result in the Scopus database

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