Cited by 32Alzheimer's disease research and treatmentsCell death mechanisms and regulationAmyotrophic Lateral Sclerosis Research

WWOX dysfunction induces sequential aggregation of TRAPPC6AΔ, TIAF1, tau and amyloid β, and causes apoptosis

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Chang, J-Y, Chang, N-S·2015·Cell Death Discovery

Abstract

Aggregated vesicle-trafficking protein isoform TRAPPC6AΔ (TPC6AΔ) has a critical role in causing caspase activation, tau aggregation and A β generation in the brains of nondemented middle-aged humans, patients with Alzheimer’s disease (AD) and 3-week-old Wwox gene knockout mice. WWOX blocks neurodegeneration via interactions with tau and tau-phosphorylating enzymes. WWOX deficiency leads to epilepsy, mental retardation and early death. Here, we demonstrated that TGF-β 1 induces shuttling of endogenous wild-type TPC6A and TPC6AΔ in between nucleoli and mitochondria (~40–60 min per round trip), and WWOX reduces the shuttling time by 50%. TGF-β 1 initially maximizes the binding of TPC6AΔ to the C-terminal tail of WWOX, followed by dissociation. TPC6AΔ then undergoes aggregation, together with TIAF1 (TGF-β 1-induced antiapoptotic factor), in the mitochondria to induce apoptosis. An additional rescue scenario is that TGF-β 1 induces Tyr33 phosphorylation and unfolding of WWOX and its the N-terminal WW domain slowly binds TPC6AΔ to block aggregation and apoptosis. Similarly, loss of WWOX induces TPC6AΔ polymerization first, then aggregation of TIAF1, amyloid β and tau, and subsequent cell death, suggesting that a cascade of protein aggregation leads to neurodegeneration.

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Authors
Chang, J.-Y., & Chang, N.-S.
Affiliations
National Cheng Kung University (TW)
Corresponding author
Chang, N-S
Venue
Cell Death Discovery
Published
2015-08-03
Volume
1
Issue
1
Pages
15003-15003
ISSN
2058-7716 (ISSN-L)
OpenAlex
W2522568537
Cited by
32
References
47
Citations by year
2026: 2 · 2024: 5 · 2023: 1 · 2022: 4 · 2021: 6 · 2020: 2 · 2019: 3 · 2018: 3 · 2017: 2 · 2016: 3 · 2015: 1
FWCI
2.21
Type
journal article
Language
en
Open access
Locations
  • Cell Death Discovery (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • U.S. Department of Defense (W81XWH-08–1-0682, W81XWH)
  • American Society for Biochemistry and Molecular Biology
  • National Science Council
  • Ministry of Science and Technology, Taiwan (W81XWH-08-1-0682, 2320-B-006)
  • National Health Research Institutes (NHRI-EX102)
  • National Cheng Kung University
  • National Institute of Biomedical Imaging and Bioengineering (R01EB002009)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
  • Health Sciences › Medicine › Neurology › Amyotrophic Lateral Sclerosis Research
Keywords
WWOX, tau aggregation, amyloid-beta, TGF-β1, protein aggregation, apoptosis, neurodegeneration, Alzheimer's disease, protein shuttling, WW domain, protein unfolding, caspase activation

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