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Updated: Sep 26, 2025

Using Enzyme-based Biosensors to Measure Tonic and Phasic Glutamate in Alzheimer's Mouse Models

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Tau Protein Modulates Perineuronal Extracellular Matrix Expression in the TauP301L-acan Mouse Model.

Sophie Schmidt¹, Max Holzer¹, Thomas Arendt¹

¹Paul Flechsig Institute of Brain Research, Medical Faculty, University of Leipzig, 04103 Leipzig, Germany.

|April 23, 2022

Summary

This summary is machine-generated.

Tau mutations impact brain cells, but perineuronal nets (PNs) offer protection. This study reveals tau influences PN structure and components, suggesting a mutual relationship impacting neurodegeneration.

Keywords:

P301L aggrecan neuroprotection perineuronal nets sulfated proteoglycans tau pathology

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Area of Science:

Neuroscience
Cell Biology
Biochemistry

Background:

Tau mutations are linked to neurodegenerative dementias.
Perineuronal nets (PNs) protect neurons from tau pathology.
Aggrecan, a key PN component, may shield neurons from misfolded tau.

Purpose of the Study:

To investigate if tau regulates the structure and protein expression of PNs.
To explore the relationship between tau and PN components in a mouse model.

Main Methods:

Immunohistochemical and biochemical analyses were performed.
Protein levels of PN components and protein phosphatase 2A were assessed.
Co-immunoprecipitation was used to identify physical interactions.

Main Results:

Protein levels of PN components differed between mouse groups.
Changes in protein phosphatase 2A expression were observed.
Tau was found to modulate PN components like brevican and physically interact with them.

Conclusions:

Tau influences the structure and protein composition of perineuronal nets.
A complex, mutual interrelation exists between tau and PN proteoglycans.
This interaction may play a role in tau-associated neurodegenerative processes.