Cited by 196Alzheimer's disease research and treatmentsNF-κB Signaling PathwaysNeuroinflammation and Neurodegeneration Mechanisms

Secreted β-Amyloid Precursor Protein Counteracts the Proapoptotic Action of Mutant Presenilin-1 by Activation of NF-κB and Stabilization of Calcium Homeostasis

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Guo, Qing, Robinson, Nic, Mattson, Mark P.·1998·Journal of Biological Chemistry

Abstract

Mutations in the presenilin-1 (PS-1) gene account for approximately 50% of the cases of autosomal dominant, early onset, inherited forms of Alzheimer's disease (AD). PS-1 is an integral membrane protein expressed in neurons and is localized primarily in the endoplasmic reticulum (ER). PS-1 mutations may promote neuronal degeneration by altering the processing of the beta-amyloid precursor protein (APP) and/or by engaging apoptotic pathways. Alternative processing of APP in AD may increase production of neurotoxic amyloid beta-peptide (Abeta) and reduce production of the neuroprotective alpha-secretase-derived form of APP (sAPPalpha). In differentiated PC12 cells expressing an AD-linked PS-1 mutation (L286V), sAPPalpha activated the transcription factor NF-kappaB and prevented apoptosis induced by Abeta. Treatment of cells with kappaB decoy DNA blocked the antiapoptotic action of sAPPalpha, demonstrating the requirement for NF-kappaB activation in the cytoprotective action of sAPPalpha. Cells expressing mutant PS-1 exhibited an aberrant pattern of NF-kappaB activity following exposure to Abeta, which was characterized by enhanced early activation of NF-kappaB followed by a prolonged depression of activity. Blockade of NF-kappaB activity in cells expressing mutant PS-1 by kappaB decoy DNA was associated with enhanced Abeta-induced increases of [Ca2+]i and mitochondrial dysfunction. Treatment of cells with sAPPalpha stabilized [Ca2+]i and mitochondrial function and suppressed oxidative stress by a mechanism involving activation of NF-kappaB. Blockade of ER calcium release prevented (and stimulation of ER calcium release by thapsigargin induced) apoptosis in cells expressing mutant PS-1, suggesting a pivotal role for ER calcium release in the proapoptotic action of mutant PS-1. Finally, a role for NF-kappaB in preventing apoptosis induced by ER calcium release was demonstrated by data showing that sAPPalpha prevents thapsigargin-induced apoptosis, an effect blocked by kappaB decoy DNA. We conclude that sAPPalpha stabilizes cellular calcium homeostasis and protects neural cells against the proapoptotic action of mutant PS-1 by a mechanism involving activation of NF-kappaB. The data further suggest that PS-1 mutations result in aberrant NF-kappaB regulation that may render neurons vulnerable to apoptosis.

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Authors
Guo, Q., Robinson, N., & Mattson, M. P.
Affiliations
University of Kentucky (US)
Corresponding author
Mattson, Mark P.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
1998-05
Volume
273
Issue
20
Pages
12341-12351
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2055585878
Cited by
196
References
85
Citations by year
2026: 2 · 2022: 2 · 2021: 5 · 2020: 3 · 2019: 3 · 2018: 3 · 2017: 5 · 2016: 7 · 2015: 4 · 2014: 1 · 2013: 5 · 2012: 5
FWCI
13.93
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5r01ag014554-07, 5r01ns035253-03, NS35253, AG05144, AG14554)
  • National Institute on Aging (P50AG005144, AG14554, AG-05144)
  • National Institute of Neurological Disorders and Stroke (NS 35253)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › NF-κB Signaling Pathways
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
presenilin 1, amyloid precursor protein, sAPPα, NF-κB, apoptosis, Alzheimer's disease, calcium homeostasis, endoplasmic reticulum calcium release, thapsigargin, mitochondrial dysfunction, oxidative stress, amyloid-beta, PC12 cells
MeSH terms
Animals, Calcium, Homeostasis, Humans, Membrane Proteins, Mutation, Amyloid beta-Peptides, NF-kappa B, Amyloid beta-Protein Precursor, PC12 Cells, Apoptosis, Rats, Presenilin-1

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