Cited by 140Alzheimer's disease research and treatmentsCellular transport and secretionAutophagy in Disease and Therapy

The endosomal-lysosomal pathway is dysregulated by APOE4 expression in vivo

Open access
Nuriel, Tal, Peng, Katherine Y., Ashok, Archana, Dillman, Allissa A., Figueroa, Helen Y., Apuzzo, Justin, Ambat, Jayanth, Levy, Efrat +3 more·2017·Frontiers in Neuroscience

Abstract

Possession of the ε4 allele of apolipoprotein E (APOE) is the major genetic risk factor for late-onset Alzheimer’s disease (AD). Although numerous hypotheses have been proposed, the precise cause of this increased AD risk is not yet known. In order to gain a more comprehensive understanding of APOE4's role in AD, we performed RNA-sequencing on an AD-vulnerable vs. an AD-resistant brain region from aged APOE targeted replacement mice. This transcriptomics analysis revealed a significant enrichment of genes involved in endosomal-lysosomal processing, suggesting an APOE4-specific endosomal-lysosomal pathway dysregulation in the brains of APOE4 mice. Further analysis revealed clear differences in the morphology of endosomal-lysosomal compartments, including an age-dependent increase in the number and size of early endosomes in APOE4 mice. These findings directly link the APOE4 genotype to endosomal-lysosomal dysregulation in an in vivo, AD pathology-free setting, which may play a causative role in the increased incidence of AD among APOE4 carriers.

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Crossref · 10.3389/fnins.2017.00702

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  • APOE4-bound cholesterol, taken up by the cell, is released from the receptor in the late endosome or lysosome, and aggregation of APOE4 has been shown to cause endosomal congestion and dysfunction.

    “APOE4-bound cholesterol, taken up by the cell, is released from the receptor in the late endosome or lysosome, and aggregation of APOE4 has been shown to cause endosomal congestion and dysfunction (Narayan et al., 2020; Nuriel et al., 2017; Rawat et al., 2019).”

    From APOE2, E3, and E4 differentially modulate cellular homeostasis, cholesterol metabolism, and inflammatory response in isogenic iPSC-derived astrocytes (2022) · cites this paper as Nuriel et al., 2017

    The Discussion reports that APOE4 expression causes endosomal–lysosomal dysregulation and enlarged early endosomes in aged mice. It does not show that APOE4 aggregation causes this dysfunction, or describe receptor release of APOE4-bound cholesterol in late endosomes or lysosomes. The Introduction discusses aggregation of Aβ, not aggregation of APOE4. (LLM, conf=0.87)

    Experimental — accuracy not yet measured
  • The endosomal-lysosomal dysregulation observed in the brains of aged APOE4 mice was not restricted to the EC.

    “As the endosomal-lysosomal dysregulation that we observed in the brains of aged APOE4 mice was not restricted to the EC30”
  • APOE4 affects the endosomal-lysosomal pathway and the APOE4 induced recycling block can be rescued by decreasing pH.

    “APOE4 affects, however, the endosomal-lysosomal pathway (Nuriel et al, 2017) and the APOE4 induced recycling block can be rescued by decreasing pH (Xian et al, 2018).”

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Research works printed but not linked: 1

  1. Houlden H. Crook R. Backhovens H. Prihar G. Baker M. Hutton M.. (1998). ApoE genotype is a risk factor in nonpresenilin early-onset Alzheimer's disease families. Am. J. Med. Genet. 81, 117– 121. 9514597

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Authors
Nuriel, T., Peng, K. Y., Ashok, A., Dillman, A. A., Figueroa, H. Y., Apuzzo, J., Ambat, J., Levy, E., Cookson, M. R., Mathews, P. M., & Duff, K. E.
Affiliations
  • Columbia University Irving Medical Center (US)
  • NYU Langone Health (US)
  • National Institutes of Health (US)
  • Nathan Kline Institute for Psychiatric Research (US)
Corresponding author
  • Mathews, Paul M.
  • Duff, Karen E.
Venue
Frontiers in Neuroscience
Published
2017-12-12
Volume
11
Pages
702-702
ISSN
1662-453X (ISSN-L)
OpenAlex
W2775642640
Cited by
140
References
59
Citations by year
2026: 10 · 2025: 17 · 2024: 16 · 2023: 15 · 2022: 19 · 2021: 21 · 2020: 23 · 2019: 17 · 2018: 2
FWCI
8.50
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Frontiers in Neuroscience (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • National Institute on Aging (AG048408, AG047797, AG017617)
  • National Institute of Neurological Disorders and Stroke (NS071836)
  • BrightFocus Foundation (A2014200F)
  • Cure Alzheimer's Fund
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
Keywords
APOE ε4, apolipoprotein E, endolysosomal pathway, Alzheimer's disease, late-onset Alzheimer's disease, early endosomes, lysosomal dysfunction, genetic risk factors, transcriptomics

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