Apr 23, 2020

Reactive Oxygen Species Modulate Activity-Dependent AMPA Receptor Transport in C. elegans

BioRxiv : the Preprint Server for Biology
R. L. DoserFrederic J Hoerndli

Abstract

The AMPA subtype of synaptic glutamate receptors (AMPARs) play an essential role in cognition. Their function, numbers and change at synapses during synaptic plasticity, is tightly regulated by neuronal activity. Although we know that long-distance transport of AMPARs is essential for this regulation, we do not understand the regulatory mechanisms of it. Neuronal transmission is a metabolically demanding process in which ATP consumption and production are tightly coupled and regulated. Aerobic ATP synthesis unavoidably produces reactive oxygen species (ROS), such as hydrogen peroxide, which are known modulators of calcium signaling. Although a role for calcium signaling in AMPAR transport has been described, there is little understanding of the mechanisms involved and no known link to physiological ROS signaling. Here, using real-time in vivo imaging of AMPAR transport in the intact C. elegans nervous system, we demonstrate that long-distance synaptic AMPAR transport is bidirectionally regulated by calcium influx and activation of calcium/calmodulin-dependent protein kinase II. Quantifying in vivo calcium dynamics revealed that modest, physiological increases in ROS decrease calcium transients in C. elegans glutamatergic neuron...Continue Reading

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Mentioned in this Paper

Study
Pathogenic Organism
Anatomical Space Structure
Study of Epigenetics
Gene Regulatory Networks
Simulation
Antagonists
Erythrocytes
Parasitic Diseases
Phenotype Determination

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