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Scientific article
English

An Automated Toolbox to Predict Single Subject Atrophy in Presymptomatic Granulin Mutation Carriers

Published inJournal of Alzheimer's disease, vol. 86, no. 1, p. 205-218
Publication date2022
Abstract

Background: Magnetic resonance imaging (MRI) measures may be used as outcome markers in frontotemporal dementia (FTD).

Objectives: To predict MRI cortical thickness (CT) at follow-up at the single subject level, using brain MRI acquired at baseline in preclinical FTD.

Methods: 84 presymptomatic subjects carrying Granulin mutations underwent MRI scans at baseline and at follow-up (31.2±16.5 months). Multivariate nonlinear mixed-effects model was used for estimating individualized CT at follow-up based on baseline MRI data. The automated user-friendly preGRN-MRI script was coded.

Results: Prediction accuracy was high for each considered brain region (i.e., prefrontal region, real CT at follow-up versus predicted CT at follow-up, mean error ≤1.87%). The sample size required to detect a reduction in decline in a 1-year clinical trial was equal to 52 subjects (power = 0.80, alpha = 0.05).

Conclusion: The preGRN-MRI tool, using baseline MRI measures, was able to predict the expected MRI atrophy at follow-up in presymptomatic subjects carrying GRN mutations with good performances. This tool could be useful in clinical trials, where deviation of CT from the predicted model may be considered an effect of the intervention itself.

eng
Keywords
  • Frontotemporal dementia
  • Granulin
  • Magnetic resonance imaging
  • Mutation
  • Preclinical
  • Presymptomatic
  • Atrophy / pathology
  • Brain / diagnostic imaging
  • Brain / pathology
  • Frontotemporal Dementia / diagnostic imaging
  • Frontotemporal Dementia / genetics
  • Frontotemporal Dementia / pathology
  • Granulins / genetics
  • Humans
  • Magnetic Resonance Imaging / methods
  • Mutation / genetics
  • Progranulins / genetics
Citation (ISO format)
PREMI, Enrico et al. An Automated Toolbox to Predict Single Subject Atrophy in Presymptomatic <i>Granulin </i>Mutation Carriers. In: Journal of Alzheimer’s disease, 2022, vol. 86, n° 1, p. 205–218. doi: 10.3233/JAD-215447
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Identifiers
ISSN of the journal1387-2877
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Creation11/16/2022 12:48:16 PM
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