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Updated: Jun 8, 2026
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A Time-Efficient Fluorescence Spectroscopy-Based Assay for Evaluating Actin Polymerization Status in Rodent and Human Brain Tissues
Published on: June 3, 2021
ADF/cofilin-mediated actin dynamics regulate AMPA receptor trafficking during synaptic plasticity
Jiaping Gu1, Chi Wai Lee, Yanjie Fan
1Department of Cell Biology, Center for Neurodegenerative Diseases, Emory University School of Medicine, Atlanta, Georgia, USA.
Nature Neuroscience
|September 14, 2010
Summary
Actin depolymerizing factor (ADF)/cofilin regulates synaptic plasticity by controlling AMPA receptor trafficking and spine size. Temporally controlled ADF/cofilin activity enhances postsynaptic modifications during long-term potentiation (LTP).
Area of Science:
- Neuroscience
- Cell Biology
- Molecular Biology
Background:
- Dendritic spines are crucial for synaptic plasticity.
- Actin dynamics, regulated by ADF/cofilin, influence spine morphology.
- The precise role of ADF/cofilin in synaptic potentiation is complex.
Purpose of the Study:
- To investigate the distinct roles of ADF/cofilin in spine morphology and AMPA receptor trafficking.
- To elucidate the mechanism by which ADF/cofilin regulates synaptic potentiation.
Main Methods:
- Chemically induced long-term potentiation (LTP) in neurons.
- Manipulation of ADF/cofilin activity (elevation and inhibition).
- Measurement of AMPA receptor (AMPAR) surface expression and spine morphology.
Main Results:
- Elevated ADF/cofilin activity enhanced AMPAR surface addition during LTP.
- ADF/cofilin inhibition abolished AMPAR addition, indicating its necessity.
- LTP induced a temporal phosphorylation pattern of ADF/cofilin linked to AMPAR trafficking and spine enlargement.
Conclusions:
- ADF/cofilin-mediated actin dynamics distinctly regulate AMPAR trafficking, separate from spine structural changes.
- Temporally controlled ADF/cofilin activity is essential for postsynaptic modifications, including receptor number and spine size, during synaptic plasticity.
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