Cited by 571Alzheimer's disease research and treatmentsNeuroinflammation and Neurodegeneration MechanismsDementia and Cognitive Impairment Research

CD33 Alzheimer's disease locus: altered monocyte function and amyloid biology

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The Alzheimer Disease Neuroimaging Initiative, Bradshaw, Elizabeth M, Chibnik, Lori B, Keenan, Brendan T, Ottoboni, Linda, Raj, Towfique, Tang, Anna, Rosenkrantz, Laura L +10 more·2013·Nature Neuroscience

Abstract

In our functional dissection of the CD33 Alzheimer's disease susceptibility locus, we found that the rs3865444(C) risk allele was associated with greater cell surface expression of CD33 in the monocytes (t50 = 10.06, P(joint) = 1.3 × 10(-13)) of young and older individuals. It was also associated with diminished internalization of amyloid-β 42 peptide, accumulation of neuritic amyloid pathology and fibrillar amyloid on in vivo imaging, and increased numbers of activated human microglia.

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Crossref · 10.1038/nn.3435

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  • GWAS and sequencing studies have found associations between AD and genes expressed in myeloid cells, including TREM2, ABCA7, and CD33.

    “At the genetic level, GWAS and sequencing studies have found associations between AD and genes expressed in myeloid cells, including TREM2, ABCA7, and CD331,2,5,15–17.”

    From A common haplotype lowers PU.1 expression in myeloid cells and delays onset of Alzheimer's disease (2017) · cites this paper as [17]

    The Abstract says genome-wide studies identified CD33 as an AD susceptibility locus and describes CD33 expression in myeloid cells. It does not address associations involving TREM2 or ABCA7, or sequencing findings for those genes, so it supports only the CD33 portion of the sentence. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • Limited clearance by microglia is likely to contribute to increased Aβ1-42 burden in the brains of sporadic AD dementia patients, as described for the CD33 risk allele rs3865444.

    “Limited clearance by microglia is likely to contribute to increased Ab 1 -42 burden in the brains of sporadic AD dementia patients, as described recently for the CD33 risk allele rs3865444 (13).”

    From SUCLG2 identified as both a determinator of CSF Aβ1–42 levels and an attenuator of cognitive decline in Alzheimer's disease (2014) · cites this paper as [13]

    The paper’s main text (indexed under Abstract; page unavailable) reports reduced Aβ(42) uptake by monocytes carrying rs3865444C and greater amyloid plaque burden associated with the allele. It proposes that less functional microglia/macrophages may fail to clear plaques, but does not directly demonstrate reduced microglial clearance or increased Aβ1-42 burden specifically in patients with sporadic AD dementia; its cohorts included people without AD. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • The findings strengthen the growing evidence linking AD to a network of genes expressed in microglia.

    “These results reinforce the emerging genetic and epigenetic association between AD and a network of microglial expressed genes2,5,17–21”
  • The AD-associated risk allele of CD33 likely produces the longer more active spliced form of this inhibitory receptor, which correlates with increased cell surface expression and reduced phagocytic capacity observed in human monocytes.

    “The AD-associated risk allele of CD33 likely produces the longer more active spliced form of this inhibitory receptor (Pimenova et al., 2017b), which correlates with increased cell surface expression and reduced phagocytic capacity observed in human monocytes (Bradshaw et al., 2013).”
  • Two polymorphisms in the CD33 gene modulate Alzheimer's disease risk, with the protective allele associated with reduced CD33 and increased phagocytosis.

    “Two polymorphisms in the CD33 gene have recently been identified that modulate AD risk,102, 103 with the protective allele associated with reduced CD3312, 66, 70 and increased phagocytosis.12”

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Research works printed but not linked: 2

  1. [17]Sperling RA Alzheimer’s & dementia: the journal of the Alzheimer’s Association 7 280 292 PMC3220946 21514248
  2. [37]Lopresti BJ Journal of nuclear medicine: official publication, Society of Nuclear Medicine 46 1959 1972 2005 16330558

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Authors
Initiative, T. A. D. N., Bradshaw, E. M., Chibnik, L. B., Keenan, B. T., Ottoboni, L., Raj, T., Tang, A., Rosenkrantz, L. L., Imboywa, S., Lee, M., Von Korff, A., Morris, M. C., Evans, D. A., Johnson, K., Sperling, R. A., Schneider, J. A., Bennett, D. A., & De Jager, P. L.
Affiliations
  • Brigham and Women's Hospital (US)
  • Broad Institute (US)
  • Rush University Medical Center (US)
  • Harvard University (US)
Venue
Nature Neuroscience
Published
2013-05-23
Volume
16
Issue
7
Pages
848-850
ISSN
  • 1097-6256 (ISSN-L)
  • 1546-1726
OpenAlex
W2074405990
Cited by
570
References
41
Citations by year
2026: 9 · 2025: 30 · 2024: 56 · 2023: 48 · 2022: 42 · 2021: 45 · 2020: 53 · 2019: 59 · 2018: 49 · 2017: 46 · 2016: 41 · 2015: 49 · 2014: 32 · 2013: 11
FWCI
30.79
Type
journal article
Language
en
Open access
Locations
  • Nature Neuroscience (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • Digital Access to Scholarship at Harvard (DASH) (Harvard University) (submittedVersion, cc-by)
  • eScholarship (California Digital Library) (submittedVersion, cc-by)
Funders
  • National Institute on Aging (R01AG017917, P30-AG 10161, K25AG041906, R01AG030146, R01 AG30146, R01‐AG17917, R01 AG15819, R01AG11101, P50AG005138, R01AG011101, R01AG036042, R01AG043617, R01AG015819, P30AG010161, P30AG008051, P50AG008702, P30AG013846, R01AG031553, U24AG021886)
  • National Institute of General Medical Sciences (R25GM076321, RC2GM093080)
  • National Institute of Neurological Disorders and Stroke (R10 NS067305, R01NS067305)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
Keywords
CD33, Alzheimer's disease, genetic susceptibility loci, monocytes, microglial activation, amyloid-beta, amyloid fibrils, cell surface expression
MeSH terms
Adult, Age Factors, Aged, Aged, 80 and over, Alzheimer Disease, Aniline Compounds, Brain, Dextrans, Female, Genotype, HLA-D Antigens, Humans, Male, Middle Aged, Monocytes, Peptide Fragments, Polymorphism, Genetic, Radionuclide Imaging, Thiazoles, Cohort Studies, Amyloid beta-Peptides, Microglia, Young Adult, Genetic Association Studies, Plaque, Amyloid, Cognitive Dysfunction, Sialic Acid Binding Ig-like Lectin 3

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