Cited by 88Alzheimer's disease research and treatmentsNeuroinflammation and Neurodegeneration MechanismsNeurological Disease Mechanisms and Treatments

Integrative approach to sporadic Alzheimer’s disease: deficiency of TYROBP in cerebral Aβ amyloidosis mouse normalizes clinical phenotype and complement subnetwork molecular pathology without reducing Aβ burden

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Haure-Mirande, Jean-Vianney, Wang, Minghui, Audrain, Mickael, Fanutza, Tomas, Kim, Soong Ho, Heja, Szilvia, Readhead, Ben, Dudley, Joel T. +5 more·2019·Molecular Psychiatry

Abstract

Integrative gene network approaches enable new avenues of exploration that implicate causal genes in sporadic late-onset Alzheimer’s disease (LOAD) pathogenesis, thereby offering novel insights for drug-discovery programs. We previously constructed a probabilistic causal network model of sporadic LOAD and identified TYROBP/DAP12 , encoding a microglial transmembrane signaling polypeptide and direct adapter of TREM2, as the most robust key driver gene in the network. Here, we show that absence of TYROBP/DAP12 in a mouse model of AD-type cerebral Aβ amyloidosis ( APP KM670/671NL / PSEN1 Δexon9 ) recapitulates the expected network characteristics by normalizing the transcriptome of APP/PSEN1 mice and repressing the induction of genes involved in the switch from homeostatic microglia to disease-associated microglia (DAM), including Trem2 , complement ( C1qa , C1qb , C1qc , and Itgax ), Clec7a and Cst7 . Importantly, we show that constitutive absence of TYROBP/DAP12 in the amyloidosis mouse model prevented appearance of the electrophysiological and learning behavior alterations associated with the phenotype of APP KM670/671NL / PSEN1 Δexon9 mice. Our results suggest that TYROBP/DAP12 could represent a novel therapeutic target to slow, arrest, or prevent the development of sporadic LOAD. These data establish that the network pathology observed in postmortem human LOAD brain can be faithfully recapitulated in the brain of a genetically manipulated mouse. These data also validate our multiscale gene networks by demonstrating how the networks intersect with the standard neuropathological features of LOAD.

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Crossref · 10.1038/s41380-018-0255-6

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  • Manipulation of Trem2, Tyrobp, Cx3cl1/Cx3cr1, IL1β, and IFN-γ have opposing effects on amyloid and tau pathologies.

    “Indeed, manipulation of expression of Trem2, Tyrobp, Cx3cl1/Cx3cr1, IL1β, and IFN-γ have all been shown to have opposing effects on amyloid and tau pathologies [49–51, 55–65].”

    From Deletion of Abi3/Gngt2 influences age-progressive amyloid β and tau pathologies in distinctive ways (2022) · cites this paper as [56]

    The Results report that Tyrobp deletion did not change amyloid-plaque burden in APP/PSEN1 mice, while the Discussion reports increased tau spread and phosphorylation after Tyrobp deletion in a tauopathy mouse model. This supports differing outcomes for Tyrobp, though not opposing changes in amyloid and tau burden. The paper does not establish the claimed amyloid-versus-tau effects for Trem2, Cx3cl1/Cx3cr1, IL1β, or IFN-γ. (LLM, conf=0.83)

    Experimental — accuracy not yet measured
  • A reduction of Tyrobp has neuroprotective effects on AD pathology.

    “Previous studies have shown that a reduction of Tyrobp has neuroprotective effects on AD pathology38,39.”
  • Manipulation of molecules involved in immune/microglial function in either direction may result in detrimental or exacerbated pathological outcomes.

    “However, as we have previously seen in our studies modulating Tyrobp expression, manipulation of molecules involved in immune/microglial function in either direction may result in detrimental or exacerbated pathological outcomes.49,53,54,56”
  • Numerous studies targeting members of the TREM2/TYROBP pathway (Trem2, Tyrobp, and miR155) support beneficial outcomes associated with maintenance and/or restoration of homeostatic functions of microglia.

    “Support for beneficial outcomes associated with maintenance and/or restoration of homeostatic functions of microglia comes from the numerous studies targeting the members of this pathway, including Trem2,48,50–52 Tyrobp,53,54 and miR155.41,55”
  • The dichotomy of immune effects on amyloid and tau has been demonstrated in multiple models of Trem2 and Tyrobp.

    “More recently, this dichotomy has been elegantly demonstrated in multiple models of Trem2 and Tyrobp [49–51, 55–59].”

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Authors
Haure-Mirande, J.-V., Wang, M., Audrain, M., Fanutza, T., Kim, S. H., Heja, S., Readhead, B., Dudley, J. T., Blitzer, R. D., Schadt, E. E., Zhang, B., Gandy, S., & Ehrlich, M. E.
Affiliations
  • Icahn School of Medicine at Mount Sinai (US)
  • Sema4 (United States) (US)
Corresponding author
  • Zhang, Bin
  • Gandy, Sam
  • Ehrlich, Michelle E.
Venue
Molecular Psychiatry
Published
2018-10-03
Volume
24
Issue
3
Pages
431-446
ISSN
  • 1359-4184 (ISSN-L)
  • 1476-5578
OpenAlex
W2895288124
Cited by
84
References
64
Citations by year
2026: 2 · 2025: 8 · 2024: 20 · 2023: 5 · 2022: 14 · 2021: 16 · 2020: 13 · 2019: 5 · 2018: 1
FWCI
6.00
Type
journal article
Language
en
Open access
Locations
  • Molecular Psychiatry (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • BrightFocus Foundation (A2018253F, A2016482F)
  • Cure Alzheimer's Fund (U01AG046170)
  • National Institute on Aging (AG 005138, R56AG058469, R01AG017917, R01AG057907, RF1AG058469, U01AG046170, P50AG005138, P30AG010161, RF1AG057443, RF1AG059319, R01AG061894, P30AG066514)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
  • Life Sciences › Neuroscience › Neurology › Neurological Disease Mechanisms and Treatments
Keywords
sporadic Alzheimer's disease, late-onset Alzheimer's disease, TREM2, microglia, disease-associated microglia, complement system, causal networks, microglial transcriptome, learning and memory impairment, therapeutic target
MeSH terms
Alzheimer Disease, Amyloidosis, Animals, Brain, Disease Models, Animal, Female, Humans, Male, Membrane Proteins, Mice, Inbred C57BL, Phenotype, Amyloid beta-Peptides, Amyloid beta-Protein Precursor, Mice, Knockout, Adaptor Proteins, Signal Transducing, Mice, Gene Regulatory Networks, Pathology, Molecular, Plaque, Amyloid, Transcriptome

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