Cited by 68Cell death mechanisms and regulationAlzheimer's disease research and treatmentsMitochondrial Function and Pathology

Appoptosin is a Novel Pro-Apoptotic Protein and Mediates Cell Death in Neurodegeneration

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Zhang, Han, Zhang, Yun-wu, Chen, Yaomin, Huang, Xiumei, Zhou, Fangfang, Wang, Weiwei, Xian, Bo, Zhang, Xian +8 more·2012·The Journal of Neuroscience

Abstract

Apoptosis is an essential cellular process in multiple diseases and a major pathway for neuronal death in neurodegeneration. The detailed signaling events/pathways leading to apoptosis, especially in neurons, require further elucidation. Here we identify a β-amyloid precursor protein (APP)-interacting protein, designated as appoptosin, whose levels are upregulated in brain samples from Alzheimer's disease and infarct patients, and in rodent stroke models, as well as in neurons treated with β-amyloid (Aβ) and glutamate. We further demonstrate that appoptosin induces reactive oxygen species release and intrinsic caspase-dependent apoptosis. The physiological function of appoptosin is to transport/exchange glycine/5-amino-levulinic acid across the mitochondrial membrane for heme synthesis. Downregulation of appoptosin prevents cell death and caspase activation caused by glutamate or Aβ insults. APP modulates appoptosin-mediated apoptosis through interaction with appoptosin. Our study identifies appoptosin as a crucial player in apoptosis and a novel pro-apoptotic protein involved in neuronal cell death, providing a possible new therapeutic target for neurodegenerative disorders.

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Crossref · 10.1523/jneurosci.3668-12.2012

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  • Appoptosin expression is upregulated in AD, where it can activate the intrinsic caspase pathway; downregulation of appoptosin can protect against Aβ-induced neurotoxicity.

    “We have recently identified a mitochondrial protein, appoptosin, as an important regulator for Aβ-induced neuronal cell death. The expression of appoptosin is upregulated in AD, where it can activate the intrinsic caspase pathway. Notably, downregulation of appoptosin can protect against Aβ-induced neurotoxicity [101].”

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Authors
Zhang, H., Zhang, Y.-W., Chen, Y., Huang, X., Zhou, F., Wang, W., Xian, B., Zhang, X., Masliah, E., Chen, Q., Han, J.-D. J., Bu, G., Reed, J. C., Liao, F.-F., Chen, Y.-G., & Xu, H.
Affiliations
  • Sanford Burnham Prebys Medical Discovery Institute (US)
  • Tsinghua University (CN)
  • Xiamen University (CN)
  • Chinese Academy of Sciences (CN)
  • University of California San Diego (US)
  • University of Tennessee Health Science Center (US)
Venue
The Journal of Neuroscience
Published
2012-10-31
Volume
32
Issue
44
Pages
15565-15576
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2033166503
Cited by
68
References
47
Citations by year
2026: 3 · 2025: 3 · 2024: 5 · 2023: 5 · 2022: 1 · 2021: 8 · 2020: 7 · 2019: 6 · 2018: 3 · 2017: 1 · 2016: 8 · 2015: 7 · 2014: 7 · 2013: 3 · 2012: 1
FWCI
2.32
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • Rare & Special e-Zone (The Hong Kong University of Science and Technology) (submittedVersion)
Funders
  • Alzheimer's Association
  • American Health Assistance Foundation
  • National Natural Science Foundation of China (30930050)
  • Natural Science Foundation of Fujian Province
  • Fok Ying Tung Education Foundation
  • National Institutes of Health
  • Program for New Century Excellent Talents in University
  • National Key Research and Development Program of China (2010CB833706)
  • Fundamental Research Funds for the Central Universities
  • National Institute on Aging (P01AG030128, R01AG038710, R01AG027924, R01AG030197, R37AG018440, R01AG018440, R03AG034366, P50AG005131, AG-5131, R01AG031893, R21AG038968, AG 18440, R01AG021173, R01AG035355)
  • National Institute of Neurological Disorders and Stroke (R01NS046673, R01NS054880, P01NS074969)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Mitochondrial Function and Pathology
Keywords
apoptosis, neurodegeneration, Alzheimer's disease, amyloid-beta, glutamate excitotoxicity, neuronal cell death, reactive oxygen species, caspase activation, heme biosynthesis, 5-aminolevulinic acid, glycine transport, stroke, therapeutic target
MeSH terms
Aged, Aged, 80 and over, Alzheimer Disease, Animals, Female, Genetic Complementation Test, Heme, Humans, Immunohistochemistry, Male, Microscopy, Fluorescence, Mitochondria, Nerve Degeneration, Neurons, Pregnancy, Amyloid beta-Protein Precursor, Cell Death, Apoptosis, Annexin A5, Reactive Oxygen Species, Caspases, Brain Infarction, RNA Interference, Cell Line, Tumor, Apoptosis Regulatory Proteins, Mice, Rats

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