Investigating reliable amyloid accumulation in Centiloids: Results from the AMYPAD Prognostic and Natural History Study.
Alzheimers Dement
; 20(5): 3429-3441, 2024 May.
Article
de En
| MEDLINE
| ID: mdl-38574374
ABSTRACT
INTRODUCTION:
To support clinical trial designs focused on early interventions, our study determined reliable early amyloid-ß (Aß) accumulation based on Centiloids (CL) in pre-dementia populations.METHODS:
A total of 1032 participants from the Amyloid Imaging to Prevent Alzheimer's Disease-Prognostic and Natural History Study (AMYPAD-PNHS) and Insight46 who underwent [18F]flutemetamol, [18F]florbetaben or [18F]florbetapir amyloid-PET were included. A normative strategy was used to define reliable accumulation by estimating the 95th percentile of longitudinal measurements in sub-populations (NPNHS = 101/750, NInsight46 = 35/382) expected to remain stable over time. The baseline CL threshold that optimally predicts future accumulation was investigated using precision-recall analyses. Accumulation rates were examined using linear mixed-effect models.RESULTS:
Reliable accumulation in the PNHS was estimated to occur at >3.0 CL/year. Baseline CL of 16 [12,19] best predicted future Aß-accumulators. Rates of amyloid accumulation were tracer-independent, lower for APOE ε4 non-carriers, and for subjects with higher levels of education.DISCUSSION:
Our results support a 12-20 CL window for inclusion into early secondary prevention studies. Reliable accumulation definition warrants further investigations.Mots clés
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Peptides bêta-amyloïdes
/
Tomographie par émission de positons
/
Maladie d'Alzheimer
/
Dérivés de l'aniline
Limites:
Aged
/
Female
/
Humans
/
Male
/
Middle aged
Langue:
En
Journal:
Alzheimers Dement
Année:
2024
Type de document:
Article
Pays d'affiliation:
Royaume-Uni