Cited by 70Alzheimer's disease research and treatmentsDementia and Cognitive Impairment ResearchNeuroinflammation and Neurodegeneration Mechanisms

Mutations in APP have independent effects on Aβ and CTFγ generation

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Hecimovic, Silva, Wang, Jun, Dolios, Georgia, Martinez, Maribel, Wang, Rong, Goate, Alison M.·2004·Neurobiology of Disease

Abstract

Understanding the molecular mechanism of beta-amyloid (Abeta) generation is crucial for Alzheimer's disease pathogenesis as well as for normal APP function. The transmembrane domain (TM) of APP appears to undergo presenilin-dependent gamma-secretase cleavage at two topologically distinct sites: a site in the middle of the TM domain that is crucial for the generation of Abeta-peptides, and a site close to the cytoplasmic border (S3-like/epsilon site) of the TM domain that leads to production of the APP intracellular domain (CTFgamma/AICD). We demonstrate that, in contrast to the unique effect of familial Alzheimer's disease (FAD) mutations in APP on Abeta42 production, some but not all FAD mutations also affect CTFgamma generation. Furthermore, changes in total CTFgamma levels do not correlate with either an increase or a decrease of any Abeta species, and inhibition of Abeta-peptide formation starting from position +1 (Abeta1-x) does not affect CTFgamma production. These results suggest that cleavage at the gamma40/42- and the S3-like sites can be dissociated, and that APP signaling and Abeta production are not tightly linked.

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Crossref · 10.1016/j.nbd.2004.04.018

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  • All autosomal dominant mutations associated with rare familial early onset AD in APP and presenilin 1 and 2 increase the proportion of Aβ42 to Aβ40 peptides.

    “all autosomal dominant mutations associated with rare familial forms of early onset AD in the amyloid precursor protein (APP) and presenilin (PS) 1 and 2 were shown to increase the proportion of Aβ42 to Aβ40 peptides.”

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Authors
Hecimovic, S., Wang, J., Dolios, G., Martinez, M., Wang, R., & Goate, A. M.
Affiliations
  • Washington University in St. Louis (US)
  • Icahn School of Medicine at Mount Sinai (US)
Corresponding author
Goate, Alison M.
Venue
Neurobiology of Disease
Publisher
Elsevier BV
Published
2004-11
Volume
17
Issue
2
Pages
205-218
ISSN
0969-9961 (ISSN-L)
OpenAlex
W2085469435
Cited by
70
References
57
Citations by year
2026: 1 · 2025: 5 · 2024: 1 · 2022: 4 · 2021: 1 · 2019: 1 · 2017: 2 · 2016: 1 · 2015: 3 · 2014: 4 · 2013: 3 · 2012: 3
FWCI
3.49
Type
journal article
Language
en
Open access
Locations
  • Neurobiology of Disease (publishedVersion)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
National Institute on Aging (P01AG010491, AG10491, AG17050, R01AG017050)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
APP mutations, gamma-secretase, APP intracellular domain, familial Alzheimer's disease, amyloid-beta 42, transmembrane domain, Alzheimer's disease pathogenesis
MeSH terms
Alzheimer Disease, Cell Line, Humans, Mutation, Peptide Fragments, Endopeptidases, Amyloid beta-Peptides, Aspartic Acid Endopeptidases, Amyloid beta-Protein Precursor, Protein Transport, Amyloid Precursor Protein Secretases

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