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Updated: Dec 7, 2025

A Molecular Readout of Long-term Olfactory Adaptation in C. elegans
Published on: December 22, 2012
Sensory Glia Detect Repulsive Odorants and Drive Olfactory Adaptation
Duo Duan1, Hu Zhang2, Xiaomin Yue2
1Department of Neurobiology and Department of Neurosurgery of the First Affiliated Hospital, Zhejiang University School of Medicine, Zhejiang 310053, China; NHC and CAMS Key Laboratory of Medical Neurobiology, MOE Frontier Science Center for Brain Research and Brain-Machine Integration, School of Brain Science and Brain Medicine, Zhejiang University, Hangzhou, Zhejiang 310053, China; Department of Neurology of Second Affiliated Hospital, Zhejiang University School of Medicine, Zhejiang 310053, China.
Glial cells actively participate in sensing smells. In C. elegans, AMsh glia use distinct receptors to suppress avoidance responses and promote olfactory adaptation by inhibiting ASH neurons.
Area of Science:
- Neuroscience
- Cell Biology
- Sensory Biology
Background:
- Glia traditionally support neural development and synaptic transmission.
- The ASH neuron in C. elegans is a polymodal sensory neuron detecting aversive odorants.
Purpose of the Study:
- To investigate the role of glia in olfactory transduction.
- To elucidate the mechanism by which glia influence sensory neuron function.
Main Methods:
- Investigated cell-autonomous responses of AMsh glia to aversive odorants.
- Utilized G-protein-coupled receptors (GPCRs) distinct from those in ASH neurons.
- Examined the role of GABA signaling in glial-neuronal communication.
Main Results:
- AMsh glia respond to aversive odorants via unique GPCRs.
- Activated AMsh glia suppress ASH neuron-mediated avoidance behavior.
- Glia promote olfactory adaptation by inhibiting ASH neurons through GABA signaling.
Conclusions:
- Proposed a novel two-receptor model for adaptive olfaction involving glia and sensory neurons.
- Revealed a non-canonical function of glia in olfactory transduction.
- Suggests potential insights into mammalian sensory processing by glia-like cells.
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