NfL reliability across laboratories, stage-dependent diagnostic performance and matrix comparability in genetic FTD: a large GENFI study.
J Neurol Neurosurg Psychiatry
; 95(9): 822-828, 2024 Aug 16.
Article
en En
| MEDLINE
| ID: mdl-38253362
ABSTRACT
BACKGROUND:
Blood neurofilament light chain (NfL) is increasingly considered as a key trial biomarker in genetic frontotemporal dementia (gFTD). We aimed to facilitate the use of NfL in gFTD multicentre trials by testing its (1) reliability across labs; (2) reliability to stratify gFTD disease stages; (3) comparability between blood matrices and (4) stability across recruiting sites.METHODS:
Comparative analysis of blood NfL levels in a large gFTD cohort (GENFI) for (1)-(4), with n=344 samples (n=148 presymptomatic, n=11 converter, n=46 symptomatic subjects, with mutations in C9orf72, GRN or MAPT; and n=139 within-family controls), each measured in three different international labs by Simoa HD-1 analyzer.RESULTS:
NfL revealed an excellent consistency (intraclass correlation coefficient (ICC) 0.964) and high reliability across the three labs (maximal bias (pg/mL) in Bland-Altmananalysis:
1.12±1.20). High concordance of NfL across laboratories was moreover reflected by high areas under the curve for discriminating conversion stage against the (non-converting) presymptomatic stage across all three labs. Serum and plasma NfL were largely comparable (ICC 0.967). The robustness of NfL across 13 recruiting sites was demonstrated by a linear mixed effect model.CONCLUSIONS:
Our results underline the suitability of blood NfL in gFTD multicentre trials, including cross-lab reliable stratification of the highly trial-relevant conversion stage, matrix comparability and cross-site robustness.Palabras clave
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Base de datos:
MEDLINE
Asunto principal:
Biomarcadores
/
Proteínas de Neurofilamentos
/
Demencia Frontotemporal
Tipo de estudio:
Diagnostic_studies
Idioma:
En
Revista:
J Neurol Neurosurg Psychiatry
Año:
2024
Tipo del documento:
Article