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Updated: Nov 8, 2025

A High-content Assay for Monitoring AMPA Receptor Trafficking
Published on: January 28, 2019
AMPA Receptors Exist in Tunable Mobile and Immobile Synaptic Fractions In Vivo
Haiwen Chen1,2,3, Richard H Roth3, Elena Lopez-Ortega3
1Division of Pediatric Neurology, Department of Neurology, Johns Hopkins University School of Medicine, MD 21205.
Abstract:
AMPA receptor (AMPAR) mobility within synapses has been extensively studied in vitro However, whether similar mobility properties apply to AMPARs in vivo has yet to be determined. Here, we use two-photon fluorescence recovery after photobleaching (FRAP) to study AMPAR mobility within individual dendritic spines in live animals using an overexpression vector. We demonstrate the existence of mobile and immobile fractions of AMPARs across multiple cortical regions and layers. Additionally, we find that AMPAR mobility can be altered in vivo in response to administration of corticosterone, a condition that mimics exposure to stress.
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