Evidence map›Paper›PMID 23820808›Full record

ArticleActa neuropathologica2013

The Alzheimer's β-secretase BACE1 localizes to normal presynaptic terminals and to dystrophic presynaptic terminals surrounding amyloid plaques.

Patty C Kandalepas, Katherine R Sadleir, William A Eimer, Jie Zhao, Daniel A Nicholson, Robert Vassar

Erratum issuedOpen access · hybridAbstract read
In one paragraph

Article in Acta neuropathologica, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 152 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
152citing papers in PubMed, 1 pooled it
10.9field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

152 citing papers in PubMed, 1 synthesis or guideline pooled it, 239 citations in OpenAlex.

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92 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

  • Erratum issued
5 · Who and what money

Authors and funding

6 authors at 3 institutions in 3 countries.

Patty C KandalepasDepartment of Cell and Molecular Biology, The Feinberg School of Medicine, Northwestern University, 300 East Superior Street, Tarry 8-713, Chicago, IL 60611-3006, USA.
Katherine R Sadleir
William A Eimer
Jie Zhao
Daniel A Nicholson
Robert Vassar
Northwestern University · USGlaxoSmithKline (China) · CNRush University Medical Center · US

Funding

Tumor Environment and Metastasis (TEAM) Research ProgramP30CA060553 · NCI · NORTHWESTERN UNIVERSITY AT CHICAGO · PI Daniela E Matei · 1993 to 2026
$153.9M
SYNAPTIC SUBSTRATES OF AGE-DEPENDENT MEMORY DEFICITSR01AG017139 · NIA · NORTHWESTERN UNIVERSITY AT CHICAGO · PI DISTERHOFT, JOHN F · 1999 to 2013
$4.6M
BACE1 as a Therapeutic Target for Alzheimer's DiseaseR01AG022560 · NIA · NORTHWESTERN UNIVERSITY AT CHICAGO · PI VASSAR, ROBERT J · 2003 to 2017
$4.6M
Molecular Neuropathology and Mechanisms of BACE1 Elevation in Alzheimer's DiseaseR01AG030142 · NIA · NORTHWESTERN UNIVERSITY AT CHICAGO · PI VASSAR, ROBERT J · 2007 to 2019
$3.1M
BACE1 as a Therapeutic Target for Alzheimer's DiseaseRF1AG022560 · NIA · NORTHWESTERN UNIVERSITY AT CHICAGO · PI VASSAR, ROBERT J · 2019 to 2019
$2.0M
Proteomic reconstructive microscopy of healthy and diseased dendritesR01AG047073 · NIA · RUSH UNIVERSITY MEDICAL CENTER · PI NICHOLSON, DANIEL A · 2013 to 2016
$1.3M
Synaptic dysregulation in a mouse model of Alzheimer's diseaseR00AG031574 · NIA · RUSH UNIVERSITY MEDICAL CENTER · PI NICHOLSON, DANIEL A · 2009 to 2011
$671k
NCI NIH HHS P30 CA060553NIA NIH HHS R00 AG031574NIA NIH HHS R01 AG017139NIA NIH HHS R01 AG022560NIA NIH HHS R01 AG030142NIA NIH HHS R01 AG047073NIA NIH HHS RF1 AG022560
6 · The paper itself

Abstract

β-Site amyloid precursor protein (APP) cleaving enzyme-1 (BACE1) is the β-secretase that initiates Aβ production in Alzheimer's disease (AD). BACE1 levels are increased in AD, which could contribute to pathogenesis, yet the mechanism of BACE1 elevation is unclear. Furthermore, the normal function of BACE1 is poorly understood. We localized BACE1 in the brain at both the light and electron microscopic levels to gain insight into normal and pathophysiologic roles of BACE1 in health and AD, respectively. Our findings provide the first ultrastructural evidence that BACE1 localizes to vesicles (likely endosomes) in normal hippocampal mossy fiber terminals of both non-transgenic and APP transgenic (5XFAD) mouse brains. In some instances, BACE1-positive vesicles were located near active zones, implying a function for BACE1 at the synapse. In addition, BACE1 accumulated in swollen dystrophic autophagosome-poor presynaptic terminals surrounding amyloid plaques in 5XFAD cortex and hippocampus. Importantly, accumulations of BACE1 and APP co-localized in presynaptic dystrophies, implying increased BACE1 processing of APP in peri-plaque regions. In primary cortical neuron cultures, treatment with the lysosomal protease inhibitor leupeptin caused BACE1 levels to increase; however, exposure of neurons to the autophagy inducer trehalose did not reduce BACE1 levels. This suggests that BACE1 is degraded by lysosomes but not by autophagy. Our results imply that BACE1 elevation in AD could be linked to decreased lysosomal degradation of BACE1 within dystrophic presynaptic terminals. Elevated BACE1 and APP levels in plaque-associated presynaptic dystrophies could increase local peri-plaque Aβ generation and accelerate amyloid plaque growth in AD.

Indexed as

Alzheimer DiseaseAmyloid Precursor Protein SecretasesAnimalsAspartic Acid EndopeptidasesAutophagyHumansMiceMice, TransgenicPlaque, AmyloidPresynaptic TerminalsSynapsesAmyloid Precursor Protein SecretasesAspartic Acid EndopeptidasesBACE1 protein, human

Identifiers

PMID23820808
PMCPMC3753469
OpenAlexW2069248995

What OpenQuestion holds

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LicenceCC BY
Read underepoch 390

Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.