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Updated: Feb 19, 2026
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Author Spotlight: Understanding the Impact of Pathological Proteins on Axonal Transport in Neurodegenerative Diseases
Published on: December 22, 2023
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GSK-3β coordinates axonal microtubule organization through Shot and Tau
André Voelzmann1,2, Lubna Nuhu-Soso3, Alex E Roof3
1School of Environmental and Life Sciences, Faculty of Science and Engineering, University of Hull, Hull HU6 7RX, United Kingdom.
Summary
Glycogen Synthase Kinase 3β (GSK-3β) is crucial for neuronal maintenance. Its dysregulation disrupts microtubule organization, leading to neurodegenerative disease pathology.
Area of Science:
- Neuroscience
- Molecular Biology
- Cell Biology
Background:
- Glycogen Synthase Kinase 3β (GSK-3β) is vital for neuronal development and maintenance.
- Hyperactive GSK-3β is implicated in neurodevelopmental and neurodegenerative diseases, making it a therapeutic target.
Purpose of the Study:
- To investigate the role of GSK-3β kinase activity in maintaining microtubule organization in neurons.
- To identify GSK-3β targets involved in microtubule bundling and understand the mechanism of GSK-3β-mediated microtubule regulation.
Main Methods:
- Utilized *Drosophila* and rat axon models to study GSK-3β function.
- Examined the effects of GSK-3β up- or downregulation on microtubule structure and organization.
- Identified and analyzed the interaction of GSK-3β with microtubule-associated proteins Shot and Tau.
Main Results:
- Tight regulation of GSK-3β activity is essential for maintaining parallel microtubule bundles in axons.
- Altered GSK-3β levels caused pathological axonal swellings with disorganized microtubules.
- GSK-3β directly targets Shot and Tau, regulating their interaction with microtubules and Eb1.
- Misregulation of GSK-3β disrupts Eb1-Shot-mediated microtubule bundling, leading to disorganization.
Conclusions:
- GSK-3β plays a critical role in regulating microtubule organization through Shot and Tau.
- Microtubule disorganization, resulting from GSK-3β misregulation, links its hyperactivity to neurodegeneration.
- This mechanism may explain the limited success of global GSK-3β inhibition in clinical trials.
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