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Glia Modulate a Neuronal Circuit for Locomotion Suppression during Sleep in C. elegans
Menachem Katz1, Francis Corson2, Shachar Iwanir3
1Laboratory of Developmental Genetics, The Rockefeller University, 1230 York Avenue, New York, NY 10065, USA.
Cell Reports
|March 8, 2018
Summary
Glial cells (glia) in C. elegans regulate sleep by modulating neural circuits. Ablating these glia disrupts sleep and development, indicating their crucial role in promoting healthy sleep behavior.
Area of Science:
- Neuroscience
- Glial Biology
- Developmental Biology
Background:
- Glia are increasingly recognized for their roles in regulating sleep across diverse species.
- In Caenorhabditis elegans, sleep is a crucial process linked to larval molting stages.
Purpose of the Study:
- To investigate the role of astrocyte-like CEPsh glia in modulating sleep-like behaviors and neural activity in C. elegans larvae.
- To understand how glia influence the neural circuits controlling sleep and locomotion.
Main Methods:
- Targeted ablation of CEPsh glia in C. elegans larvae.
- Behavioral analysis of sleep, locomotion, and development in wild-type and glia-ablated animals.
- Calcium imaging of neuronal activity in identified sleep- and locomotion-associated neurons (ALA and AVE).
Main Results:
- Glia ablation led to abnormal sleep patterns, including prolonged immobility, sleep, and developmental delays.
- CEPsh glia were found to ensheath synapses between the ALA neuron and the AVE interneuron.
- Glia ablation caused uncoupled, prolonged calcium transients in AVE neurons, independent of movement.
- Ablation of the ALA neuron suppressed all observed defects in glia-ablated animals.
Conclusions:
- Glia attenuate sleep-promoting inhibitory connections between ALA and AVE neurons, thereby regulating sleep.
- This study reveals specific functions for glia in controlling sleep behavior.
- The findings suggest conserved mechanisms for glial regulation of sleep across different animal species.
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