Alzheimer's polygenic risk scores are associated with cognitive phenotypes in Down syndrome
Open accessAbstract
INTRODUCTION: This study aimed to investigate the influence of the overall Alzheimer's disease (AD) genetic architecture on Down syndrome (DS) status, cognitive measures, and cerebrospinal fluid (CSF) biomarkers. METHODS: AD polygenic risk scores (PRS) were tested for association with DS‐related traits. RESULTS: The AD risk PRS was associated with disease status in several cohorts of sporadic late‐ and early‐onset and familial late‐onset AD, but not in familial early‐onset AD or DS. On the other hand, lower DS Mental Status Examination memory scores were associated with higher PRS, independent of intellectual disability and APOE (PRS including APOE , PRS APOE , p = 2.84 × 10 −4 ; PRS excluding APOE , PRS nonAPOE , p = 1.60 × 10 −2 ). PRS APOE exhibited significant associations with Aβ42, tTau, pTau, and Aβ42/40 ratio in DS. DISCUSSION: These data indicate that the AD genetic architecture influences cognitive and CSF phenotypes in DS adults, supporting common pathways that influence memory decline in both traits. Highlights: Examination of the polygenic risk of AD in DS presented here is the first of its kind. AD PRS influences memory aspects in DS individuals, independently of APOE genotype . These results point to an overlap between the genes and pathways that leads to AD and those that influence dementia and memory decline in the DS population. APOE ε4 is linked to DS cognitive decline, expanding cognitive insights in adults.
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In DSAD, the effect of APOEε4 genotype on the age of onset of clinical features of disease and AD biomarkers is significant, but relatively modest compared with the effect of the genotype in LOAD, and may be limited to females.
“Notably, recent work has indicated that in DSAD, the effect of APOEε4 genotype on the age of onset of clinical features of disease and AD biomarkers is significant, but relatively modest compared with the effect of the genotype in LOAD, and may be limited to females [5, 20, 32].”
From Apolipoprotein E abundance is elevated in the brains of individuals with Down syndrome–Alzheimer’s disease (2025) · cites this paper as [20]
The Results section (page not specified) reports significant associations of APOE ε4 carrier status with several CSF biomarkers in Down syndrome, and the Discussion links APOE ε4 to poorer memory scores. The cited paper does not establish an effect on the age of onset of clinical features or biomarkers, compare the magnitude of an onset effect with LOAD, or report that the effect may be limited to females. (LLM, conf=0.84)
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- Authors
- Gorijala, P., Aslam, M. M., Dang, L. T., Xicota, L., Fernandez, M. V., Sung, Y. J., Fan, K., Feingold, E., Surace, E. I., Chhatwal, J. P., Hom, C. L., Dominantly Inherited Alzheimer Network (DIAN), T. A. D. N. I. (., the NIA‐LOAD family study, F. T. A. B. C. S. (. I., Hartley, S. L., Hassenstab, J., Perrin, R. J., Mapstone, M., Zaman, S. H., Ances, B. M., Kamboh, M. I., Lee, J. H., & Cruchaga, C.
- Affiliations
- Washington University in St. Louis (US)
- University of Pittsburgh (US)
- Columbia University Irving Medical Center (US)
- Department of Psychiatry Washington University School of Medicine St. Louis Missouri USA
- Consejo Nacional de Investigaciones Científicas y Técnicas (AR)
- Harvard University (US)
- University of California, Irvine (US)
- University of Wisconsin–Madison (US)
- Corresponding author
- Cruchaga, Carlos
- ORCID
- Venue
- Alzheimer's & Dementia
- Publisher
- Wiley
- Published
- 2023-10-19
- Volume
- 20
- Issue
- 2
- Pages
- 1038-1049
- ISSN
- 1552-5260 (ISSN-L)
- 1552-5279
- PMC
- PMC10916941
- OpenAlex
- W4387764774
- Cited by
- 13
- References
- 43
- Citations by year
- 2026: 4 · 2025: 7 · 2024: 1 · 2023: 1
- FWCI
- 3.32
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- Alzheimer s & Dementia (publishedVersion, cc-by-nc-nd)
- PubMed Central (publishedVersion, cc-by-nc-nd)
- PubMed (publishedVersion)
- Apollo (University of Cambridge) (submittedVersion, cc-by-nc-nd)
- Funders
- National Institutes of Health (U01 AG024904, P01AG003991, RF1AG053303, RF1AG058501, U01AG058922, RF1AG074007, R01AG064877)
- Chan Zuckerberg Initiative
- Michael J. Fox Foundation for Parkinson's Research (LI‐W81XWH2010849)
- National Institute on Aging
- Alzheimer's Association (SG‐20‐690363‐DIAN)
- Deutsches Zentrum für Neurodegenerative Erkrankungen
- Japan Agency for Medical Research and Development
- Korea Health Industry Development Institute
- Alzheimer's Disease Neuroimaging Initiative (U01 AG024904, W81XWH‐12‐2‐0012)
- National Institute of Biomedical Imaging and Bioengineering
- National Center for Advancing Translational Sciences (UL1 TR001873, UL1 TR002373, UL1 TR001414, UL1 TR001857, UL1 TR002345)
- Eunice Kennedy Shriver National Institute of Child Health and Human Development
- Topics
- Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Down syndrome and intellectual disability research
- Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
- Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
- Keywords
- Alzheimer's disease, Down syndrome
- MeSH terms
- Genetic Risk Score, Adult, Alzheimer Disease, Apolipoproteins E, Cognition, Down Syndrome, Humans, Memory Disorders, Phenotype, Biomarkers, Amyloid beta-Peptides, Cognitive Dysfunction
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