Abstract
Background
MRI atrophy predicts cognitive status in AD. However, this relationship has not been investigated in early-onset AD (EOAD, < 65 years) patients with a biomarker-based diagnosis.
Methods
Forty eight EOAD (MMSE ≥ 15; A + T + N +) and forty two age-matched healthy controls (HC; A − T − N −) from a prospective cohort underwent full neuropsychological assessment, 3T-MRI scan and lumbar puncture at baseline. Participants repeated the cognitive assessment annually. We used linear mixed models to investigate whether baseline cortical thickness (CTh) or subcortical volume predicts two-year cognitive outcomes in the EOAD group.
Results
In EOAD, hemispheric CTh and ventricular volume at baseline were associated with global cognition, language and attentional/executive functioning 2 years later (p < 0.0028). Regional CTh was related to most cognitive outcomes (p < 0.0028), except verbal/visual memory subtests. Amygdalar volume was associated with letter fluency test (p < 0.0028). Hippocampal volume did not show significant associations.
Conclusion
Baseline hemispheric/regional CTh, ventricular and amygdalar volume, but not the hippocampus, predict two-year cognitive outcomes in EOAD.
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Data availability
The summary tables that support the findings of this study are available on request from the corresponding author, AL.
Code availability
Code used in this study is available on request from the corresponding author, AL.
Abbreviations
- AD:
-
Alzheimer’s disease
- Aβ:
-
Amyloid-β
- bankssts:
-
Banks of the superior temporal sulcus
- BDAE:
-
The Boston Diagnostic Aphasia Examination
- BNT:
-
Boston Naming Test
- CERAD:
-
Consortium to Establish a Registry for Alzheimer’s disease
- CSF:
-
Cerebrospinal fluid
- CTh:
-
Cortical thickness
- DFR:
-
Delayed free recall
- Digits-B:
-
Digits span backwards
- Digits-F:
-
Digits span forwards
- DTR:
-
Delayed total recall
- EOAD:
-
Early-onset AD
- LFT:
-
Letter fluency test
- FCSRT:
-
Free and Cued Selective Reminding Test
- FDG-PET:
-
Fluorodeoxyglucose positron emission tomography
- FL:
-
Free learning
- GC:
-
Global composite
- HC:
-
Healthy controls
- HCB:
-
Hospital Clínic de Barcelona
- LM:
-
Linear model
- LME:
-
Linear mixed-effects model
- LOAD:
-
Late-onset AD
- MMSE:
-
Mini-Mental State Examination
- MRI:
-
Magnetic resonance imaging
- MTL:
-
Medial temporal lobe
- NIA-AA:
-
National Institute on Aging-Alzheimer’s Association
- SF:
-
Semantic fluency test
- TL:
-
Total learning
- TMT-A:
-
Trail Making Test-A
- VOSP:
-
Visual object and space perception battery
- WAB:
-
Western Aphasia Battery
- WAIS:
-
Wechsler Adult Intelligence Scale
- YOE:
-
Years of education
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Acknowledgements
The authors thank patients, their relatives and healthy controls for their participation in the research. We acknowledge support for the project provided by Spanish Ministry of Science and Innovation-Instituto de Salud Carlos III, Fondo Europeo de Desarrollo Regional (FEDER), Unión Europea, “Una manera de hacer Europa”, CERCA Programme/Generalitat de Catalunya and Departament de Salut—Generalitat de Catalunya (PERIS 2016-2020). We also are indebted to the Magnetic Resonance Image core facility of the Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) for the technical help.
Funding
This work was supported by Spanish Ministry of Science and Innovation-Instituto de Salud Carlos III and Fondo Europeo de Desarrollo Regional (FEDER), Unión Europea, “Una manera de hacer Europa” [PI19/00449 to Dr. Lladó (AL)] and CERCA Programme/Generalitat de Catalunya. AL also received funding from Departament de Salut—Generalitat de Catalunya (PERIS 2016–2020 SLT008/18/00061). Roser Sala-Llonch received funding from the Biomedical Imaging Group, Biomedical Research Networking Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Barcelona, Spain. Nuria Guillén received funding from a PFIS grant (FI20/00076). Oscar Ramos received funding from a PFIS grant (FI18/00121). This work has been partially performed thanks to the 3T Equipment of Magnetic Resonance at IDIBAPS (project IBPS15-EE-3688 co funded by MCIU and by ERDF).
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Approval was obtained from Hospital Clínic Ethics Committee. The procedures used in this study adhere to the tenets of the Declaration of Helsinki.
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Contador, J., Pérez-Millan, A., Guillen, N. et al. Baseline MRI atrophy predicts 2-year cognitive outcomes in early-onset Alzheimer’s disease. J Neurol 269, 2573–2583 (2022). https://doi.org/10.1007/s00415-021-10851-9
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DOI: https://doi.org/10.1007/s00415-021-10851-9