Cited by 39Alzheimer's disease research and treatmentsAdenosine and Purinergic SignalingProtein Kinase Regulation and GTPase Signaling

Ezrin/Radixin/Moesin Are Required for the Purinergic P2X7 Receptor (P2X7R)-dependent Processing of the Amyloid Precursor Protein

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Darmellah, Amaria, Rayah, Amel, Auger, Rodolphe, Cuif, Marie-Hélène, Prigent, Magali, Arpin, Monique, Alcover, Andres, Delarasse, Cécile +1 more·2012·Journal of Biological Chemistry

Abstract

The amyloid precursor protein (APP) can be cleaved by α-secretases in neural cells to produce the soluble APP ectodomain (sAPPα), which is neuroprotective. We have shown previously that activation of the purinergic P2X7 receptor (P2X7R) triggers sAPPα shedding from neural cells. Here, we demonstrate that the activation of ezrin, radixin, and moesin (ERM) proteins is required for the P2X7R-dependent proteolytic processing of APP leading to sAPPα release. Indeed, the down-regulation of ERM by siRNA blocked the P2X7R-dependent shedding of sAPPα. We also show that P2X7R stimulation triggered the phosphorylation of ERM. Thus, ezrin translocates to the plasma membrane to interact with P2X7R. Using specific pharmacological inhibitors, we established the order in which several enzymes trigger the P2X7R-dependent release of sAPPα. Thus, a Rho kinase and the MAPK modules ERK1/2 and JNK act upstream of ERM, whereas a PI3K activity is triggered downstream. For the first time, this work identifies ERM as major partners in the regulated non-amyloidogenic processing of APP.

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Authors
Darmellah, A., Rayah, A., Auger, R., Cuif, M.-H., Prigent, M., Arpin, M., Alcover, A., Delarasse, C., & Kanellopoulos, J. M.
Affiliations
  • Centre National de la Recherche Scientifique (FR)
  • Université Paris-Sud (FR)
Corresponding author
  • Delarasse, Cécile
  • Kanellopoulos, Jean M.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2012-10
Volume
287
Issue
41
Pages
34583-34595
ISSN
0021-9258 (ISSN-L)
OpenAlex
W1971870999
Cited by
38
References
75
Citations by year
2026: 2 · 2024: 4 · 2023: 6 · 2022: 4 · 2021: 1 · 2020: 4 · 2019: 3 · 2018: 2 · 2017: 2 · 2016: 2 · 2015: 5 · 2014: 2 · 2013: 1
FWCI
1.72
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Agence Nationale de la Recherche (ANR-07-BLAN-0089)
  • Association France Alzheimer
  • Centre National de la Recherche Scientifique
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Physiology › Adenosine and Purinergic Signaling
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
Keywords
amyloid precursor protein, P2X7 receptor, ezrin, radixin, moesin, ERM proteins, alpha-secretase, Rho kinase, ERK1/2, JNK, phosphatidylinositol 3-kinase, receptor translocation, purinergic signaling
MeSH terms
Ezrin, Animals, Cytoskeletal Proteins, Humans, Membrane Proteins, Microfilament Proteins, Amyloid beta-Protein Precursor, Phosphatidylinositol 3-Kinases, Mitogen-Activated Protein Kinase 1, Cell Line, Tumor, Mitogen-Activated Protein Kinase 3, Mice, rho-Associated Kinases, HEK293 Cells, Receptors, Purinergic P2X7, Proteolysis

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