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An Anoxia-starvation Model for Ischemia/Reperfusion in C. elegans
Published on: March 11, 2014
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Tau clearance reverses touch neuron dysfunction in both young and aged C. elegans.
Trae A Carroll1, Gail Vw Johnson2, Keith Nehrke3
1Department of Pathology and Laboratory Medicine, University of Rochester School of Medicine and Dentistry, Rochester, NY, USA.
Journal of Alzheimer'S Disease : JAD
|November 24, 2025
Summary
Phosphorylated tau (T231E) impairs touch sensation in C. elegans neurons. Removing tau reversed these deficits, even in older worms, suggesting Alzheimer's disease neuronal dysfunction is reversible.
Area of Science:
- Neuroscience
- Genetics
- Aging Research
Background:
- Alzheimer's disease (AD) is a growing concern, with current therapies targeting amyloid-beta and tau aggregates offering limited success.
- Phosphorylation of tau protein, particularly at Threonine 231 (T231E), is a critical early event in AD progression.
- Previous studies linked T231E tau expression in C. elegans mechanosensory neurons to age-dependent sensory deficits.
Purpose of the Study:
- To investigate if T231E tau preferentially affects specific neuronal subclasses in C. elegans.
- To determine if tau clearance can reverse the observed neuronal deficits.
- To assess the impact of T231E tau on age-dependent sensory behaviors.
Main Methods:
- Generation of novel C. elegans models expressing pan-neuronal human tau with an auxin-inducible degron.
- Utilized diverse behavioral assays to evaluate light-touch sensation.
- Assessed the reversibility of tau-induced deficits through age-dependent tau depletion.
Main Results:
- Tau depletion successfully rescued light-touch behavioral deficits across all tested ages, including in aged worms.
- Older worms exhibited the most pronounced deficits, which were still reversible upon tau removal.
- Mechanosensory neurons in C. elegans were identified as preferentially impacted by T231E tau.
Conclusions:
- Neuronal dysfunction caused by phosphorylated tau (T231E) in C. elegans is reversible.
- These findings support therapeutic strategies aimed at reducing soluble tau levels for Alzheimer's disease.
- The study provides evidence that targeting upstream events like tau phosphorylation may be a viable therapeutic avenue.
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