Cited by 48Neuroscience and Neuropharmacology ResearchAlzheimer's disease research and treatmentsMemory and Neural Mechanisms

Differential splicing and glycosylation of Apoer2 alters synaptic plasticity and fear learning

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Wasser, Catherine R., Masiulis, Irene, Durakoglugil, Murat S., Lane-Donovan, Courtney, Xian, Xunde, Beffert, Uwe, Agarwala, Anandita, Hammer, Robert E. +1 more·2014·Science Signaling

Abstract

Glycosylation of the apolipoprotein E receptor Apoer2 is important for regulating synaptic function and cognition.

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Crossref · 10.1126/scisignal.2005438

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61 of 61 references verified0 citation errors · 0 not checkable

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  • Mild increases in ApoER2 levels in response to exon 16 deletion led to enhanced LTP.

    “Interestingly, while mild increases in ApoER2 levels in response to exon 16 deletion led to enhanced LTP (Wasser et al., 2014), we showed constitutive high level of ApoER2 expression in IDOL-deficient mice severely impaired LTP.”

    From The E3 ubiquitin ligase IDOL regulates synaptic ApoER2 levels and is important for plasticity and learning (2017) · cites this paper as Wasser et al., 2014

    The Results report that exon 16 deletion increased Apoer2 abundance and enhanced LTP in hippocampal slices when exon 19 was present. But deletion of exon 16 did not enhance LTP when exon 19 was also absent, so the claim omits a necessary condition. The Results describe a twofold Apoer2 increase in the mice with enhanced LTP, rather than characterizing it as mild. (LLM, conf=0.87)

    Experimental — accuracy not yet measured
  • Lrp8 lacking exon 16 increases the stability of ApoER2 in neurons and is associated with higher spine density.

    “Lrp8 lacking exon 16, which encodes the O-linked sugar (OLS) domain, increased the stability of ApoER2 in neurons and was associated with higher spine density (Wasser et al., 2014).”

    From The E3 ubiquitin ligase IDOL regulates synaptic ApoER2 levels and is important for plasticity and learning (2017) · cites this paper as Wasser et al., 2014

    The Results section on hippocampal spine density reports increased Apoer2 abundance in exon-16-lacking mice and higher spine density, though the increase in average spine density was significant only in mice also lacking exon 19 (page unavailable). The Discussion says reduced cleavage might make Apoer2 more stable, but also reports increased Apoer2 mRNA; it does not establish increased protein stability in neurons as a measured finding. (LLM, conf=0.85)

    Experimental — accuracy not yet measured
  • Spine density is decreased in ApoER2 KO mice and increased with ApoER2 overexpression.

    “Our observation that IDOL bidirectionally regulate spine density through ApoER2 is consistent with previous studies showing that spine density is decreased in ApoER2 KO mice and increased in the setting of ApoER2 overexpression (Dumanis et al., 2011; Wasser et al., 2014).”
  • IDOL bidirectionally regulates spine density through ApoER2.

    “Our observation that IDOL bidirectionally regulate spine density through ApoER2 is consistent with previous studies showing that spine density is decreased in ApoER2 KO mice and increased in the setting of ApoER2 overexpression (Dumanis et al., 2011; Wasser et al., 2014).”
  • Exclusion of the OLS domain imparts strong resistance to cleavage of ApoER2 and prevents release of both the extracellular and intracellular fragments.

    “In addition to increased abundance of the receptor, exclusion of the OLS domain, which contains the extracellular cleavage site, imparts a strong resistance to the cleavage of ApoER2 and thus prevents the release of both the extracellular and the intracellular fragments of ApoER2 (34).”

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Authors
Wasser, C. R., Masiulis, I., Durakoglugil, M. S., Lane-Donovan, C., Xian, X., Beffert, U., Agarwala, A., Hammer, R. E., & Herz, J.
Affiliations
  • The University of Texas Southwestern Medical Center (US)
  • Center for Translational Neurodegeneration Research, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.
Corresponding author
  • Wasser, Catherine R.
  • Masiulis, Irene
  • Herz, Joachim
Venue
Science Signaling
Published
2014-11-25
Volume
7
Issue
353
Pages
ra113-ra113
ISSN
  • 1937-9145 (ISSN-L)
  • 1945-0877
OpenAlex
W2157735201
Cited by
48
References
61
Citations by year
2026: 1 · 2025: 3 · 2024: 3 · 2023: 6 · 2022: 7 · 2021: 3 · 2020: 3 · 2019: 2 · 2018: 4 · 2017: 6 · 2016: 7 · 2015: 2 · 2014: 1
FWCI
2.44
Type
journal article
Language
en
Open access
Locations
  • Science Signaling (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Heart, Lung, and Blood Institute (R01HL063762, R37HL063762)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
Keywords
ApoER2, apolipoprotein E receptor, differential splicing, receptor glycosylation, synaptic plasticity, fear conditioning, long-term potentiation, hippocampus, glutamate receptors, gamma-secretase cleavage, spatial learning, memory
MeSH terms
Animals, Avoidance Learning, Conditioning, Classical, Cues, Dendrites, Exons, Fear, Female, Glycosylation, Male, Mice, Inbred C57BL, Nerve Tissue Proteins, Synaptic Transmission, Protein Processing, Post-Translational, Reflex, Startle, Structure-Activity Relationship, Alternative Splicing, Protein Structure, Tertiary, Long-Term Potentiation, Maze Learning, LDL-Receptor Related Proteins, Mice, Amyloid Precursor Protein Secretases, CA1 Region, Hippocampal, Mice, 129 Strain

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