Cited by 1,050Alzheimer's disease research and treatmentsNeuroinflammation and Neurodegeneration MechanismsDementia and Cognitive Impairment Research

ApoE-Directed Therapeutics Rapidly Clear β-Amyloid and Reverse Deficits in AD Mouse Models

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Cramer, Paige E., Cirrito, John R., Wesson, Daniel W., Lee, C. Y. Daniel, Karlo, J. Colleen, Zinn, Adriana E., Casali, Brad T., Restivo, Jessica L. +5 more·2012·Science

Abstract

Reversing Decline?: Apolipoprotein E (apoE) normally helps in the clearance of β-amyloid from the brain, a process that is compromised in Alzheimer's disease. Cramer et al. (p. 1503 , published online 9 February; see the Perspective by Strittmatter ) now show that a drug that increases apoE expression rapidly promoted soluble β-amyloid clearance in a mouse model of Alzheimer's disease. The drug also improved cognitive, social, and olfactory performance and rapidly improved neural circuit function. Similar therapeutics may potentially help to ameliorate the symptoms of Alzheimer's disease and its prodromal states.

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Crossref · 10.1126/science.1217697

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  • Trans-BBB efflux of Aβ into peripheral blood circulation is one of the main pathways of physiological clearance, with ApoE, ApoJ, and ApoA1 as chaperones.

    “Several groups have reported that trans-BBB efflux of Aβ into peripheral blood circulation is one of the main pathways of physiological clearance with ApoE, ApoJ, and ApoA1 as chaperones27,31,32.”

    From Brain-targeted drug delivery by manipulating protein corona functions (2019) · cites this paper as [32]

    The Abstract (page unavailable) says apoE facilitates physiological Aβ clearance from the brain, and the paper reports apoE-dependent clearance in mice. It does not identify efflux across the blood–brain barrier into peripheral blood as a main clearance pathway or name ApoJ and ApoA1 as chaperones. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • Bexarotene increases apoE levels in mice within hours.

    “bexarotene (an RXR agonist) increases apoE levels”

    From APOE4-specific Changes in Aβ Accumulation in a New Transgenic Mouse Model of Alzheimer Disease (2012) · cites this paper as [76]

    The apoE-expression passage (indexed under Abstract; page not provided) reports increased apoE expression in bexarotene-treated mice after treatment measured in days. The six-hour passage reports a decrease in Aβ, not an increase in apoE, so the added 'within hours' timing is not supported. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • Treatment with LXR/RXR agonists increases levels of ABCA1 and APOE and decreases amyloid deposition in APP overexpressing cells and mice.

    “Several studies demonstrated that treatment of LXR/RXR agonists increase the levels of ABCA1 and APOE and decrease amyloid deposition in APP overexpressing cells and mice [73-77].”

    From MicroRNAs in brain cholesterol metabolism and their implications for Alzheimer's disease (2016) · cites this paper as [74]

    The Abstract (passage 6; page unavailable) reports increased apoE and ABCA1 expression and reduced Aβ plaques after short-term bexarotene treatment in APP/PS1 mice. It also reports increased expression in treated primary microglia and astrocytes (passage 2), but does not identify these as APP-overexpressing cells or show decreased amyloid deposition in them. Plaque burden was unchanged after three months of treatment in APP/PS1 mice (passage 5). (LLM, conf=0.87)

    Experimental — accuracy not yet measured
  • Treatment of several AD Tg mice models with liver X receptor or retinoid X receptor agonists, which upregulate ApoE expression and enhance its lipidation status, resulted in reduction of Aβ plaque load through enhancing clearance of Aβ by glial cells.

    “In addition, treatment of several AD Tg mice models with liver X receptor or retinoid X receptor agonists, which upregulate ApoE expression and enhance its lipidation status, resulted in reduction of Ab plaque load through enhancing clearance of Ab by glial cells.43,44”

    From Blocking the Interaction between Apolipoprotein E and Aβ Reduces Intraneuronal Accumulation of Aβ and Inhibits Synaptic Degeneration (2013) · cites this paper as [44]

    Split into 2 atoms — 1 confirmed, 1 partially supported, 0 disputed, 0 misattributed, 0 unverifiable. Expand the claim to see per-atom verdicts.

    Experimental — accuracy not yet measured
  • Bexarotene facilitates intracellular degradation of soluble Aβ1-42 in a PPARγ-, liver X receptor-, and apolipoprotein E-dependent manner.

    “Recently, the RXR agonist bexarotene has been reported to facilitate the intracellular degradation of soluble A␤ 1-42 in a PPAR␥-, liver X receptor-, and apolipoprotein E-dependent manner (Cramer et al., 2012).”

    From PPARγ/RXRα-Induced and CD36-Mediated Microglial Amyloid-β Phagocytosis Results in Cognitive Improvement in Amyloid Precursor Protein/Presenilin 1 Mice (2012) · cites this paper as Cramer et al., 2012

    In the passage labeled Abstract (page unavailable), the paper reports that bexarotene facilitated degradation of soluble Aβ42 by primary microglia and astrocytes in a PPARγ-, LXR-, and apoE-dependent manner. It does not specify that the degradation was intracellular; a search for “intracellular” found no passage establishing that detail. (LLM, conf=0.86)

    Experimental — accuracy not yet measured

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Authors
Cramer, P. E., Cirrito, J. R., Wesson, D. W., Lee, C. Y. D., Karlo, J. C., Zinn, A. E., Casali, B. T., Restivo, J. L., Goebel, W. D., James, M. J., Brunden, K. R., Wilson, D. A., & Landreth, G. E.
Affiliations
  • Case Western Reserve University (US)
  • Washington University in St. Louis (US)
  • Nathan Kline Institute for Psychiatric Research (US)
  • University of Pennsylvania (US)
Corresponding author
Landreth, Gary E.
Venue
Science
Published
2012-03-23
Volume
335
Issue
6075
Pages
1503-1506
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W2081388499
Cited by
1,050
References
31
Citations by year
2026: 27 · 2025: 31 · 2024: 41 · 2023: 37 · 2022: 53 · 2021: 67 · 2020: 59 · 2019: 71 · 2018: 57 · 2017: 68 · 2016: 90 · 2015: 106 · 2014: 131 · 2013: 123 · 2012: 88
FWCI
96.72
Type
journal article
Language
en
Open access
Locations
  • Science (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institute on Aging (R01AG037693, AG030482-03S1, R01AG030482, K01AG029524, P50AG005681)
  • National Institute on Deafness and Other Communication Disorders (DC-003906, R01DC003906)
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
Alzheimer's disease, amyloid-beta clearance, apolipoprotein E, bexarotene, retinoid X receptor, PPARγ, liver X receptor, nuclear receptor agonists, amyloid plaques, cognitive impairment, social dysfunction, olfactory dysfunction, neural circuit function
MeSH terms
Liver X Receptors, Bexarotene, Alzheimer Disease, Amyloidosis, Animals, Apolipoproteins E, Astrocytes, Behavior, Animal, Brain, Disease Models, Animal, Male, Mice, Inbred C57BL, Mice, Transgenic, Odorants, Olfactory Pathways, Phagocytosis, Tetrahydronaphthalenes, Amyloid beta-Peptides, Microglia, Extracellular Fluid, Retinoid X Receptors, PPAR gamma, Mice, Orphan Nuclear Receptors, Plaque, Amyloid, Molecular Targeted Therapy

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