Residence times of receptors in dendritic spines analyzed by simulations in empirical domains

TL;DR

This study uses simulations based on high-resolution imaging to analyze how long AMPA receptors stay in dendritic spines, revealing variability based on spine type and the presence of organized structures affecting receptor trafficking.

Contribution

The paper introduces a simulation approach that converts short-range receptor trajectories into long-range trajectories using empirical imaging data, enabling detailed residence time analysis.

Findings

Residence time varies from 1 to 5 minutes depending on spine type.

Transient organized structures influence receptor trafficking.

Simulation method bridges short and long-range trajectory analysis.

Abstract

Analysis of high-density superresolution imaging of receptors reveal the organization of dendrites at the nano-scale resolution. We present here simulations in empirical live cell images, which allows converting local information extracted from short range trajectories into simulations of long range trajectories. Based on these empirical simulations, we compute the residence time of an AMPA receptor (AMPAR) in dendritic spines that accounts for receptors local interactions and geometrical organization. We report here that depending on the type of the spine, the residence time varies from one to five minutes. Moreover, we show that there exists transient organized structures, previously described as potential wells that can regulate the trafficking of AMPARs to dendritic spines.