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The Voltage-dependent Anion Channel 1 Mediates Amyloid β Toxicity and Represents a Potential Target for Alzheimer Disease Therapy
Open accessAbstract
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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“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].”
From Mitochondrial Oxidative and Nitrosative Stress and Alzheimer Disease (2020) · cites this paper as [107]
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Metadata
- 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)
- PMC
- PMC4692199
- 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
- hybrid
- doi.org
- Licence
- Locations
- Journal of Biological Chemistry (publishedVersion, cc-by)
- Europe PMC (PubMed Central) (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › 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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