Cited by 242Down syndrome and intellectual disability researchAlzheimer's disease research and treatmentsGenetics and Neurodevelopmental Disorders

The DOI matches its Crossref record; 73 of the 76 references it cites were found in a registry or an index.

Gene expression profiling in the adult Down syndrome brain

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Abstract

The mechanisms by which trisomy 21 leads to the characteristic Down syndrome (DS) phenotype are unclear. We used whole genome microarrays to characterize for the first time the transcriptome of human adult brain tissue (dorsolateral prefrontal cortex) from seven DS subjects and eight controls. These data were coanalyzed with a publicly available dataset from fetal DS tissue and functional profiling was performed to identify the biological processes central to DS and those that may be related to late onset pathologies, particularly Alzheimer disease neuropathology. A total of 685 probe sets were differentially expressed between adult DS and control brains at a stringent significance threshold (adjusted p value (q) < 0.005), 70% of these being up-regulated in DS. Over 25% of genes on chromosome 21 were differentially expressed in comparison to a median of 4.4% for all chromosomes. The unique profile of up-regulation on chromosome 21, consistent with primary dosage effects, was accompanied by widespread transcriptional disruption. The critical Alzheimer disease gene, APP, located on chromosome 21, was not found to be up-regulated in adult brain by microarray or QPCR analysis. However, numerous other genes functionally linked to APP processing were dysregulated. Functional profiling of genes dysregulated in both fetal and adult datasets identified categories including development (notably Notch signaling and Dlx family genes), lipid transport, and cellular proliferation. In the adult brain these processes were concomitant with cytoskeletal regulation and vesicle trafficking categories, and increased immune response and oxidative stress response, which are likely linked to the development of Alzheimer pathology in individuals with DS.

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Crossref · 10.1016/j.ygeno.2007.08.005

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  1. Draghici, 2003, Global functional profiling of gene expression, Genomics, 81, 98

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Metadata

Authors
Lockstone, H. E., Harris, L. W., Swatton, J. E., Wayland, M. T., Holland, A. J., & Bahn, S.
Affiliations
University of Cambridge (GB)
Corresponding author
Bahn, S.
Venue
Genomics
Publisher
Elsevier BV
Published
2007-12
Volume
90
Issue
6
Pages
647-660
ISSN
0888-7543 (ISSN-L)
OpenAlex
W2010597204
Cited by
240
References
76
Citations by year
2026: 6 · 2025: 14 · 2024: 10 · 2023: 8 · 2022: 13 · 2021: 20 · 2020: 12 · 2019: 14 · 2018: 15 · 2017: 14 · 2016: 15 · 2015: 11 · 2014: 16 · 2013: 15 · 2012: 19
FWCI
9.30
Type
journal article
Language
en
Open access
Locations
  • Genomics (publishedVersion)
  • PubMed (publishedVersion)
Funders
Stanley Medical Research Institute
Topics
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Down syndrome and intellectual disability research
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Alzheimer's disease research and treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
Keywords
Down syndrome, dorsolateral prefrontal cortex, gene expression profiling, APP processing, Notch signaling, Dlx genes, lipid transport, cell proliferation, cytoskeleton regulation, vesicle trafficking, immune response, oxidative stress response
MeSH terms
Adult, Aged, Alzheimer Disease, Chromosomes, Human, Pair 21, Down Syndrome, Female, Fetus, Humans, Male, Middle Aged, Receptors, Cell Surface, Up-Regulation, Case-Control Studies, Polymerase Chain Reaction, Amyloid beta-Protein Precursor, Prefrontal Cortex, Oligonucleotide Array Sequence Analysis, Gene Expression Profiling, Databases, Genetic, Proteomics, Protease Nexins

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