Cited by 143Alzheimer's disease research and treatmentsMitochondrial Function and PathologyCell death mechanisms and regulation

The voltage-dependent anion channel 1 mediates amyloid β toxicity and represents a potential target for Alzheimer disease therapy

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Smilansky, Angela, Dangoor, Liron, Nakdimon, Itay, Ben-Hail, Danya, Mizrachi, Dario, Shoshan-Barmatz, Varda·2015·Journal of Biological Chemistry

Abstract

The voltage-dependent anion channel 1 (VDAC1), found in the mitochondrial outer membrane, forms the main interface between mitochondrial and cellular metabolisms, mediates the passage of a variety of molecules across the mitochondrial outer membrane, and is central to mitochondria-mediated apoptosis. VDAC1 is overexpressed in post-mortem brains of Alzheimer disease (AD) patients. The development and progress of AD are associated with mitochondrial dysfunction resulting from the cytotoxic effects of accumulated amyloid β (Aβ). In this study we demonstrate the involvement of VDAC1 and a VDAC1 N-terminal peptide (VDAC1-N-Ter) in Aβ cell penetration and cell death induction. Aβ directly interacted with VDAC1 and VDAC1-N-Ter, as monitored by VDAC1 channel conductance, surface plasmon resonance, and microscale thermophoresis. Preincubated Aβ interacted with bilayer-reconstituted VDAC1 and increased its conductance ∼ 2-fold. Incubation of cells with Aβ resulted in mitochondria-mediated apoptotic cell death. However, the presence of non-cell-penetrating VDAC1-N-Ter peptide prevented Aβ cellular entry and Aβ-induced mitochondria-mediated apoptosis. Likewise, silencing VDAC1 expression by specific siRNA prevented Aβ entry into the cytosol as well as Aβ-induced toxicity. Finally, the mode of Aβ-mediated action involves detachment of mitochondria-bound hexokinase, induction of VDAC1 oligomerization, and cytochrome c release, a sequence of events leading to apoptosis. As such, we suggest that Aβ-mediated toxicity involves mitochondrial and plasma membrane VDAC1, leading to mitochondrial dysfunction and apoptosis induction. The VDAC1-N-Ter peptide targeting Aβ cytotoxicity is thus a potential new therapeutic strategy for AD treatment.

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Crossref · 10.1074/jbc.m115.691493

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  • Aβ(1-42) directly interacts with the N-terminus of VDAC1 and induces HK-I release, resulting in VDAC1 oligomerization, cytochrome c release, and apoptosis in SH-SY5Y cells.

    “Aβ(1–42) also directly interacts with the N-terminus of VDAC1 and induces HK-I release, resulting in VDAC1 oligomerization, cytochrome c release, and apoptosis in SH-SY5Y cells [107].”

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Authors
Smilansky, A., Dangoor, L., Nakdimon, I., Ben-Hail, D., Mizrachi, D., & Shoshan-Barmatz, V.
Affiliations
  • Ben-Gurion University of the Negev (IL)
  • Cornell University (US)
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2015-12
Volume
290
Issue
52
Pages
30670-30683
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2097463188
Cited by
143
References
73
Citations by year
2026: 10 · 2025: 14 · 2024: 12 · 2023: 16 · 2022: 16 · 2021: 12 · 2020: 11 · 2019: 13 · 2018: 19 · 2017: 12 · 2016: 7 · 2015: 1
FWCI
9.58
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)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
Keywords
VDAC1, amyloid-beta, Alzheimer's disease, mitochondrial dysfunction, mitochondrial apoptosis, cytochrome c release, VDAC1 oligomerization, mitochondrial outer membrane, therapeutic target
MeSH terms
Alzheimer Disease, Cell Membrane, Hexokinase, Humans, Mitochondria, Amyloid beta-Peptides, Apoptosis, Amino Acid Motifs, Cytochromes c, Cell Line, Tumor, Voltage-Dependent Anion Channel 1

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