Cited by 40Alzheimer's disease research and treatmentsMitochondrial Function and PathologyAutophagy in Disease and Therapy

A partial reduction of VDAC1 enhances mitophagy, autophagy, synaptic activities in a transgenic Tau mouse model

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Vijayan, Murali, Alvir, Rainier Vladlen, Alvir, Razelle Veronique, Bunquin, Lloyd E., Pradeepkiran, Jangampalli Adi, Reddy, P. Hemachandra·2022·Aging Cell

Abstract

Abstract Alzheimer's disease (AD) is the most common cause of mental dementia in the aged population. AD is characterized by the progressive decline of memory and multiple cognitive functions, and changes in behavior and personality. Recent research has revealed age‐dependent increased levels of VDAC1 in postmortem AD brains and cerebral cortices of APP, APPxPS1, and 3xAD.Tg mice. Further, we found abnormal interaction between VDAC1 and P‐Tau in the AD brains, leading to mitochondrial structural and functional defects. Our current study aimed to understand the impact of a partial reduction of voltage‐dependent anion channel 1 (VDAC1) protein on mitophagy/autophagy, mitochondrial and synaptic activities, and behavior changes in transgenic TAU mice in Alzheimer's disease. To determine if a partial reduction of VDAC1 reduces mitochondrial and synaptic toxicities in transgenic Tau (P301L) mice, we crossed heterozygote VDAC1 knockout (VDAC1+/−) mice with TAU mice and generated double mutant (VDAC1+/−/TAU) mice. We assessed phenotypic behavior, protein levels of mitophagy, autophagy, synaptic, other key proteins, mitochondrial morphology, and dendritic spines in TAU mice relative to double mutant mice. Partial reduction of VDAC1 rescued the TAU‐induced behavioral impairments such as motor coordination and exploratory behavioral changes, and learning and spatial memory impairments in VDAC1+/−/TAU mice. Protein levels of mitophagy, autophagy, and synaptic proteins were significantly increased in double mutant mice compared with TAU mice. In addition, dendritic spines were significantly increased; the mitochondrial number was significantly reduced, and mitochondrial length was increased in double mutant mice. Based on these observations, we conclude that reduced VDAC1 is beneficial in symptomatic‐transgenic TAU mice.

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  • Disruption of autophagic flux and failure of autophagosomes to fuse with lysosomes result in accumulation of vesicles observed in dystrophic neurites and cell bodies in tauopathy models.

    “The disruption of the autophagic flux and the failure of autophagosomes to fuse with lysosomes result in the accumulation of vesicles, which can be observed in dystrophic neurites and cell bodies in tauopathy models [27,28,29].”

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Authors
Vijayan, M., Alvir, R. V., Alvir, R. V., Bunquin, L. E., Pradeepkiran, J. A., & Reddy, P. H.
Affiliations
Texas Tech University (US)
Corresponding author
  • Vijayan, Murali
  • Reddy, P. Hemachandra
Venue
Aging Cell
Publisher
Wiley
Published
2022-07-07
Volume
21
Issue
8
Pages
e13663-e13663
ISSN
  • 1474-9718 (ISSN-L)
  • 1474-9726
OpenAlex
W4284971024
Cited by
40
References
103
Citations by year
2026: 9 · 2025: 18 · 2024: 6 · 2023: 4 · 2022: 3
FWCI
4.79
Type
journal article
Language
en
Open access
Locations
  • Aging Cell (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
National Institutes of Health (R41 AG060836, AG066347, AG069333, AG060767, NS105473, AG047812, AG042178)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
Keywords
VDAC1, Alzheimer's disease, tauopathy, mitophagy, autophagy, synaptic function, dendritic spines, mitochondrial morphology, spatial memory impairment, motor coordination, phosphorylated tau
MeSH terms
Alzheimer Disease, Animals, Autophagy, Disease Models, Animal, Mice, Transgenic, tau Proteins, Voltage-Dependent Anion Channel 1, Mice, Mitophagy

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