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Updated: May 2, 2026
In Vitro Aggregation Assays Using Hyperphosphorylated Tau Protein
Published on: January 2, 2015
Internalization and Endosomal Trafficking of Extracellular Tau in Microglia Improved by α-Linolenic Acid
Smita Eknath Desale1,2,3, Hariharakrishnan Chidambaram1,2,3, Tazeen Qureshi1,2,3
1Neurobiology Group, Division of Biochemical Sciences, CSIR-National Chemical Laboratory, Pune, India.
Abstract:
Alzheimer's disease (AD) is distinguished by extracellular accumulation of amyloid-beta plaques and intracellular neurofibrillary tangles of Tau. Pathogenic Tau species are also known to display "prion-like propagation," which explains their presence in extracellular spaces as well. Glial population, especially microglia, tend to proclaim neuroinflammatory condition, disrupted signaling mechanisms, and cytoskeleton deregulation in AD. Omega-3 fatty acids play a neuroprotective role in the brain, which can trigger the anti-inflammatory pathways as well as actin dynamics in the cells. Improvement of cytoskeletal assembly mechanism by omega-3 fatty acids would regulate the other signaling cascades in the cells, leading to refining clearance of extracellular protein burden in AD. In this study, we focused on analyzing the ability of α-linolenic acid (ALA) as a regulator of actin dynamics to balance the signaling pathways in microglia, including endocytosis of extracellular Tau burden in AD.
Insights
Omega-3 fatty acids, specifically alpha-linolenic acid (ALA), may help clear toxic Tau protein in Alzheimer's disease (AD) by regulating microglia and actin dynamics. This research explores ALA's potential to improve cellular mechanisms for reducing AD pathology.
Area of Science:
- Neuroscience
- Cell Biology
- Biochemistry
Background:
- Alzheimer's disease (AD) is characterized by amyloid-beta plaques and Tau neurofibrillary tangles.
- Pathogenic Tau exhibits prion-like propagation, contributing to extracellular accumulation.
- Microglia in AD are associated with neuroinflammation and cytoskeletal deregulation.
Purpose of the Study:
- To investigate the role of alpha-linolenic acid (ALA) in regulating microglial actin dynamics.
- To assess ALA's potential to modulate signaling pathways involved in Tau clearance.
- To explore ALA's effect on the endocytosis of extracellular Tau in Alzheimer's disease.
Main Methods:
- Analysis of alpha-linolenic acid (ALA) effects on microglial cell models.
- Assessment of actin dynamics and cytoskeletal assembly.
- Evaluation of signaling pathway activation and Tau protein endocytosis.
Main Results:
- ALA demonstrated a regulatory effect on actin dynamics in microglia.
- Potential for ALA to influence signaling cascades related to protein clearance.
- Preliminary evidence suggests ALA's impact on Tau endocytosis mechanisms.
Conclusions:
- Alpha-linolenic acid (ALA) shows promise as a modulator of microglial function in Alzheimer's disease.
- Targeting actin dynamics with ALA may offer a novel therapeutic strategy for AD.
- Further research is warranted to confirm ALA's efficacy in enhancing Tau clearance.
