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ECB-ART-53340
Alzheimers Dement 2024 Sep 03;209:6115-6132. doi: 10.1002/alz.14088.
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Development of thresholds and a visualization tool for use of a blood test in routine clinical dementia practice.

Verberk IMW , Jutte J , Kingma MY , Vigneswaran S , Gouda MMTEE , van Engelen MP , Alcolea D , Arranz J , Fortea J , Lleó A , Chevalier C , Marizzoni M , van de Giessen EM , Lemstra AW , Pijnenburg YAL , van der Flier WM , den Braber A , Wilson D , Schut MC , van Harten AC , Teunissen CE .


Abstract
INTRODUCTION: We developed a multimarker blood test result interpretation tool for the clinical dementia practice, including phosphorylated (P-)tau181, amyloid-beta (Abeta)42/40, glial fibrillary acidic protein (GFAP), and neurofilament light (NfL). METHODS: We measured the plasma biomarkers with Simoa (n = 1199), applied LASSO regression for biomarker selection and receiver operating characteristics (ROC) analyses to determine diagnostic accuracy. We validated our findings in two independent cohorts and constructed a visualization approach. RESULTS: P-tau181, GFAP, and NfL were selected. This combination had area under the curve (AUC) = 83% to identify amyloid positivity in pre-dementia stages, AUC = 87%-89% to differentiate Alzheimer's or controls from frontotemporal dementia, AUC = 74%-76% to differentiate Alzheimer's or controls from dementia with Lewy bodies. Highly reproducible AUCs were obtained in independent cohorts. The resulting visualization tool includes UpSet plots to visualize the stand-alone biomarker results and density plots to visualize the biomarker results combined. DISCUSSION: Our multimarker blood test interpretation tool is ready for testing in real-world clinical dementia settings. HIGHLIGHTS: We developed a multimarker blood test interpretation tool for clinical dementia practice. Our interpretation tool includes plasma biomarkers P-tau, GFAP, and NfL. Our tool is particularly useful for Alzheimer's and frontotemporal dementia diagnosis.

PubMed ID: 39096164
Article link: Alzheimers Dement
Grant support: [+]