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Publication Detail
Disease-related cortical thinning in presymptomatic granulin mutation carriers.
  • Publication Type:
    Journal article
  • Publication Sub Type:
    Article
  • Authors:
    Borrego-Écija S, Sala-Llonch R, van Swieten J, Borroni B, Moreno F, Masellis M, Tartaglia C, Graff C, Galimberti D, Laforce R, Rowe JB, Finger E, Vandenberghe R, Tagliavini F, de Mendonça A, Santana I, Synofzik M, Ducharme S, Levin J, Danek A, Gerhard A, Otto M, Butler C, Frisoni G, Sorbi S, Heller C, Bocchetta M, Cash DM, Convery RS, Moore KM, Rohrer JD, Sanchez-Valle R, Genetic FTD Initiative GENFI
  • Publication date:
    2021
  • Pagination:
    102540
  • Journal:
    Neuroimage Clin
  • Volume:
    29
  • Status:
    Published
  • Country:
    Netherlands
  • PII:
    S2213-1582(20)30377-6
  • Language:
    eng
  • Keywords:
    Cortical thickness, Frontotemporal dementia, GRN, Genetic mutations, Presymptomatic
Abstract
Mutations in the granulin gene (GRN) cause familial frontotemporal dementia. Understanding the structural brain changes in presymptomatic GRN carriers would enforce the use of neuroimaging biomarkers for early diagnosis and monitoring. We studied 100 presymptomatic GRN mutation carriers and 94 noncarriers from the Genetic Frontotemporal dementia initiative (GENFI), with MRI structural images. We analyzed 3T MRI structural images using the FreeSurfer pipeline to calculate the whole brain cortical thickness (CTh) for each subject. We also perform a vertex-wise general linear model to assess differences between groups in the relationship between CTh and diverse covariables as gender, age, the estimated years to onset and education. We also explored differences according to TMEM106B genotype, a possible disease modifier. Whole brain CTh did not differ between carriers and noncarriers. Both groups showed age-related cortical thinning. The group-by-age interaction analysis showed that this age-related cortical thinning was significantly greater in GRN carriers in the left superior frontal cortex. TMEM106B did not significantly influence the age-related cortical thinning. Our results validate and expand previous findings suggesting an increased CTh loss associated with age and estimated proximity to symptoms onset in GRN carriers, even before the disease onset.
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